Shell command to sum integers one per line

Question

I am looking for a command that will accept  as input  multiple lines of text  each line containing a single integer  and output the sum of these integers   As a bit of background  I have a log file which includes timing measurements  Through grepping for the relevant lines and a bit of sed reformatting I can list all of the timings in that file   I would like to work out the total  I can pipe this intermediate output to any command in order to do the final sum   I have always used expr in the past  but unless it runs in RPN mode I do not think it is going to cope with this  and even then it would be tricky    How can I get the summation of integers

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Pure bash and in a one-liner  -     cat numbers txt 1 2 3 4 5 6 7 8 9 10     I 0  for N in   cat numbers txt   do I     I    N    done  echo  I 55

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Simple php     cat numbers txt   php -r  echo array sum explode PHP EOL  stream get contents STDIN

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I ve done a quick benchmark on the existing answers which   use only standard tools  sorry for stuff like lua or rocket   are real one-liners  are capable of adding huge amounts of numbers  100 million   and are fast  I ignored the ones which took longer than a minute     I always added the numbers of 1 to 100 million which was doable on my machine in less than a minute for several solutions   Here are the results   Python     seq 100000000   python -c  import sys  print sum map int  sys stdin    5000000050000000   30s    seq 100000000   python -c  import sys  print sum int s  for s in sys stdin   5000000050000000   38s    seq 100000000   python3 -c  import sys  print sum int s  for s in sys stdin    5000000050000000   27s    seq 100000000   python3 -c  import sys  print sum map int  sys stdin     5000000050000000   22s    seq 100000000   pypy -c  import sys  print sum map int  sys stdin     5000000050000000   11s    seq 100000000   pypy -c  import sys  print sum int s  for s in sys stdin    5000000050000000   11s   Awk     seq 100000000   awk   s   1  END  print s   5000000050000000   22s   Paste  amp  Bc  This ran out of memory on my machine   It worked for half the size of the input  50 million numbers       seq 50000000   paste -s -d  -   bc 1250000025000000   17s    seq 50000001 100000000   paste -s -d  -   bc 3750000025000000   18s   So I guess it would have taken  35s for the 100 million numbers   Perl     seq 100000000   perl -lne   x        END   print  x     5000000050000000   15s    seq 100000000   perl -e  map   x         lt  gt  and print  x  5000000050000000   48s   Ruby     seq 100000000   ruby -e  puts ARGF map  amp  to i  inject  amp      5000000050000000   30s   C  Just for comparison s sake I compiled the C version and tested this also  just to have an idea how much slower the tool-based solutions are    include  lt stdio h gt  int main int argc  char   argv        long sum   0      long i   0      while scanf   ld    amp i     1            sum   sum   i            printf   ld n   sum       return 0             seq 100000000     a out  5000000050000000   8s   Conclusion  C is of course fastest with 8s  but the Pypy solution only adds a very little overhead of about 30  to 11s   But  to be fair  Pypy isn t exactly standard   Most people only have CPython installed which is significantly slower  22s   exactly as fast as the popular Awk solution   The fastest solution based on standard tools is Perl  15s

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BASH solution  if you want to make this a command  e g  if you need to do this frequently     addnums        local total 0   while read val  do        total    val      done   echo  total     Then usage    addnums  lt   tmp nums

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With jq   seq 10   jq -s  add     add  is equivalent to  reduce     as  item  0       item

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I would put a big WARNING on the commonly approved solution   awk   s   1  END  print s   mydatafile   DO NOT USE THIS     that is because in this form awk uses a 32 bit signed integer representation  it will overflow for sums that exceed 2147483647  i e   2 31    A more general answer  for summing integers  would be   awk   s   1  END  printf    0f n   s   mydatafile   USE THIS INSTEAD

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one simple solution would be to write a program to do it for you   This could probably be done pretty quickly in python  something like   sum   0 file   open  numbers txt   R   for line in file readlines    sum  int line  file close   print sum   I haven t tested that code  but it looks right   Just change numbers txt to the name of the file  save the code to a file called sum py  and in the console type in  python sum py

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perl -lne   x        END   print  x      lt  infile txt

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Real-time summing to let you monitor progress of some number-crunching task     cat numbers txt  1 2 3 4 5 6 7 8 9 10    cat numbers txt   while read new  do total     total    new    echo  total  done 1 3 6 10 15 21 28 36 45 55    There is no need to set  total to zero in this case  Neither you can access  total after the finish

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Alternative pure Perl  fairly readable  no packages or options required   perl -e  map   x         lt  gt  and print  x   lt  infile txt

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One-liner in Racket   racket -e   define  g   define i  read    if  eof-object  i  empty  cons i  g      foldr   0  g     lt  numlist txt

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I ve done a quick benchmark on the existing answers which   use only standard tools  sorry for stuff like lua or rocket   are real one-liners  are capable of adding huge amounts of numbers  100 million   and are fast  I ignored the ones which took longer than a minute     I always added the numbers of 1 to 100 million which was doable on my machine in less than a minute for several solutions   Here are the results   Python     seq 100000000   python -c  import sys  print sum map int  sys stdin    5000000050000000   30s    seq 100000000   python -c  import sys  print sum int s  for s in sys stdin   5000000050000000   38s    seq 100000000   python3 -c  import sys  print sum int s  for s in sys stdin    5000000050000000   27s    seq 100000000   python3 -c  import sys  print sum map int  sys stdin     5000000050000000   22s    seq 100000000   pypy -c  import sys  print sum map int  sys stdin     5000000050000000   11s    seq 100000000   pypy -c  import sys  print sum int s  for s in sys stdin    5000000050000000   11s   Awk     seq 100000000   awk   s   1  END  print s   5000000050000000   22s   Paste  amp  Bc  This ran out of memory on my machine   It worked for half the size of the input  50 million numbers       seq 50000000   paste -s -d  -   bc 1250000025000000   17s    seq 50000001 100000000   paste -s -d  -   bc 3750000025000000   18s   So I guess it would have taken  35s for the 100 million numbers   Perl     seq 100000000   perl -lne   x        END   print  x     5000000050000000   15s    seq 100000000   perl -e  map   x         lt  gt  and print  x  5000000050000000   48s   Ruby     seq 100000000   ruby -e  puts ARGF map  amp  to i  inject  amp      5000000050000000   30s   C  Just for comparison s sake I compiled the C version and tested this also  just to have an idea how much slower the tool-based solutions are    include  lt stdio h gt  int main int argc  char   argv        long sum   0      long i   0      while scanf   ld    amp i     1            sum   sum   i            printf   ld n   sum       return 0             seq 100000000     a out  5000000050000000   8s   Conclusion  C is of course fastest with 8s  but the Pypy solution only adds a very little overhead of about 30  to 11s   But  to be fair  Pypy isn t exactly standard   Most people only have CPython installed which is significantly slower  22s   exactly as fast as the popular Awk solution   The fastest solution based on standard tools is Perl  15s

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You can using num-utils  although it may be overkill for what you need  This is a set of programs for manipulating numbers in the shell  and can do several nifty things  including of course  adding them up  It s a bit out of date  but they still work and can be useful if you need to do something more   http   suso suso org programs num-utils

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one simple solution would be to write a program to do it for you   This could probably be done pretty quickly in python  something like   sum   0 file   open  numbers txt   R   for line in file readlines    sum  int line  file close   print sum   I haven t tested that code  but it looks right   Just change numbers txt to the name of the file  save the code to a file called sum py  and in the console type in  python sum py

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A lua interpreter is present on all fedora-based systems  fedora RHEL CentOS korora etc  because it is embedded with rpm-package the package of package manager rpm   i e rpm-lua  and if u want to learn lua this kind of problems are ideal you ll get your job done as well    cat filname   lua -e  sum   0 for i in io lines   do sum sum i end print sum     and it works  Lua is verbose though  you might have to endure some repeated keyboard stroke injury

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Apologies in advance for readability of the backticks        but these work in shells other than bash and are thus more pasteable   If you use a shell which accepts it  the   command      format is much more readable  and thus debuggable  than  command      so feel free to modify for your sanity   I have a simple function in my bashrc that will use awk to calculate a number of simple math items  calc      awk  BEGIN print               This will do   -         sqrt sin cos  parenthesis      and more depending on your version of awk      you could even get fancy with printf and format floating point output  but this is all I normally need  for this particular question  I would simply do this for each line   calc  echo      tr            so the code block to sum each line would look something like this   while read LINE        LINE     do   calc  echo   LINE  tr           you may want to filter out some lines with a case statement here done   That s if you wanted to only sum them line by line   However for a total of every number in the datafile  VARS   lt datafile  calc  echo   VARS          btw if I need to do something quick on the desktop  I use this   xcalc        A  calc         A  Xdialog --stdout --inputbox  Simple calculator  0 0  A       A    amp  amp  xcalc  A

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You can using num-utils  although it may be overkill for what you need  This is a set of programs for manipulating numbers in the shell  and can do several nifty things  including of course  adding them up  It s a bit out of date  but they still work and can be useful if you need to do something more   http   suso suso org programs num-utils

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The one-liner version in Python     python -c  import sys  print sum int l  for l in sys stdin

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Simple php     cat numbers txt   php -r  echo array sum explode PHP EOL  stream get contents STDIN

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Bit of awk should do it    awk   s   1  END  print s   mydatafile   Note  some versions of awk have some odd behaviours if you are going to be adding anything exceeding 2 31  2147483647   See comments for more background  One suggestion is to use printf rather than print   awk   s   1  END  printf    0f   s   mydatafile

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Ok  here is how to do it in PowerShell  PowerShell core  should work on Windows  Linux and Mac   Get-Content aaa dat   Measure-Object -Sum

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The following should work  assuming your number is the second field on each line    awk  BEGIN  sum 0      sum sum    2    END  print  tot    sum   Yourinputfile txt

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You can do it in python  if you feel comfortable   Not tested  just typed   out   open  filename   read    lines   out split   n   ints   map int  lines  s   sum ints  print s   Sebastian pointed out a one liner script   cat filename   python -c from fileinput import input  print sum map int  input

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sed  s        infile   bc   tail -1

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and the PHP version  just for the sake of completeness  cat  file with numbers   php -r   s   0  while  true     e   fgets STDIN   if  false      e  break   s     e    echo  s

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Paste typically merges lines of multiple files  but it can also be used to convert individual lines of a file into a single line   The delimiter flag allows you to pass a x x type equation to bc   paste -s -d  infile   bc   Alternatively  when piping from stdin    lt commands gt    paste -s -d  -   bc

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I think AWK is what you are looking for   awk   sum   1 END print sum     You can use this command either by passing the numbers list through the standard input or by passing the file containing the numbers as a parameter

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Using the GNU datamash util   seq 10   datamash sum 1   Output   55     If the input data is irregular  with spaces and tabs at odd places  this may confuse datamash  then either use the -W switch    lt commands    gt    datamash -W sum 1      or use tr to clean up the whitespace    lt commands    gt    tr -d     blank       datamash sum 1

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One-liner in Rebol   rebol -q --do  s  0 while  d  input   s  s   to-integer d  print s   lt  infile txt   Unfortunately the above doesn t work in Rebol 3 just yet  INPUT doesn t stream STDIN      So here s an interim solution which also works in Rebol 3   rebol -q --do  s  0 foreach n to-block read  infile txt  s  s   n  print s

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sed  s        infile   bc   tail -1

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one simple solution would be to write a program to do it for you   This could probably be done pretty quickly in python  something like   sum   0 file   open  numbers txt   R   for line in file readlines    sum  int line  file close   print sum   I haven t tested that code  but it looks right   Just change numbers txt to the name of the file  save the code to a file called sum py  and in the console type in  python sum py

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The following works in bash   I 0  for N in  cat numbers txt  do     I  expr  I    N  done  echo  I

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Just for completeness  there is also an R solution  seq 1 10   R -q -e  f  lt - file  stdin    open f   cat sum as numeric readLines f

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BASH solution  if you want to make this a command  e g  if you need to do this frequently     addnums        local total 0   while read val  do        total    val      done   echo  total     Then usage    addnums  lt   tmp nums

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You can use your preferred  expr  command you just need to finagle the input a little first   seq 10   tr    n         sed -e  s       g  -e s       n     xargs expr   The process is     tr  replaces the eoln characters with a   symbol   sed pads the     with spaces on each side  and then strips the final   from the line xargs inserts the piped input into the command line for expr to consume

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The following should work  assuming your number is the second field on each line    awk  BEGIN  sum 0      sum sum    2    END  print  tot    sum   Yourinputfile txt

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You can do it with Alacon - command-line utility for Alasql database   It works with Node js  so you need to install Node js and then Alasql package   To calculate sum from stdin you can use the following command    gt  cat data txt   node alacon  SELECT VALUE SUM  0   FROM TXT     gt b txt

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You can using num-utils  although it may be overkill for what you need  This is a set of programs for manipulating numbers in the shell  and can do several nifty things  including of course  adding them up  It s a bit out of date  but they still work and can be useful if you need to do something more   http   suso suso org programs num-utils

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Bit of awk should do it    awk   s   1  END  print s   mydatafile   Note  some versions of awk have some odd behaviours if you are going to be adding anything exceeding 2 31  2147483647   See comments for more background  One suggestion is to use printf rather than print   awk   s   1  END  printf    0f   s   mydatafile

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You can do it in python  if you feel comfortable   Not tested  just typed   out   open  filename   read    lines   out split   n   ints   map int  lines  s   sum ints  print s   Sebastian pointed out a one liner script   cat filename   python -c from fileinput import input  print sum map int  input

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C    simplified    echo  1  10    scc  WRL n   0  n    SCC project - http   volnitsky com project scc   SCC is C   snippets evaluator at shell prompt

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The one-liner version in Python     python -c  import sys  print sum int l  for l in sys stdin

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one simple solution would be to write a program to do it for you   This could probably be done pretty quickly in python  something like   sum   0 file   open  numbers txt   R   for line in file readlines    sum  int line  file close   print sum   I haven t tested that code  but it looks right   Just change numbers txt to the name of the file  save the code to a file called sum py  and in the console type in  python sum py

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dc -f infile -e    z1 lt r srz1 lt rp    Note that negative numbers prefixed with minus sign should be translated for dc  since  it uses   prefix rather than - prefix for that  For example  via tr  -        dc -f- -e         Edit  Since this answer got so many votes  for obscurity   here is a detailed explanation   The expression   z1 lt r srz1 lt rp does the following       interpret everything to the next   as a string       push two values off the stack  add them and push the result   z   push the current stack depth   1   push one    lt r  pop two values and execute register r if the original top-of-stack  1        is smaller     end of the string  will push the whole thing to the stack sr  pop a value  the string above  and store it in register r z   push the current stack depth again 1   push 1  lt r  pop two values and execute register r if the original top-of-stack  1      is smaller p   print the current top-of-stack   As pseudo-code    Define  add top of stack  as    Remove the two top values off the stack and add the result back If the stack has two or more values  run  add top of stack  recursively  If the stack has two or more values  run  add top of stack  Print the result  now the only item left in the stack   To really understand the simplicity and power of dc  here is a working Python script that implements some of the commands from dc and executes a Python version of the above command       Implement some commands from dc registers     r   None  stack      def add        stack append stack pop     stack pop    def z        stack append len stack   def less reg       if stack pop    lt  stack pop            registers reg    def store reg       registers reg    stack pop   def p        print stack -1       Python version of the dc command above    The equivalent to -f  read a file and push every line to the stack import fileinput for line in fileinput input        stack append int line strip      def cmd        add       z       stack append 1      less  r    stack append cmd  store  r   z   stack append 1  less  r   p

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perl -lne   x        END   print  x      lt  infile txt

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You can do it in python  if you feel comfortable   Not tested  just typed   out   open  filename   read    lines   out split   n   ints   map int  lines  s   sum ints  print s   Sebastian pointed out a one liner script   cat filename   python -c from fileinput import input  print sum map int  input

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My version   seq -5 10   xargs printf  - -  s    xargs    bc

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C    simplified    echo  1  10    scc  WRL n   0  n    SCC project - http   volnitsky com project scc   SCC is C   snippets evaluator at shell prompt

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Pure bash and in a one-liner  -     cat numbers txt 1 2 3 4 5 6 7 8 9 10     I 0  for N in   cat numbers txt   do I     I    N    done  echo  I 55

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I think AWK is what you are looking for   awk   sum   1 END print sum     You can use this command either by passing the numbers list through the standard input or by passing the file containing the numbers as a parameter

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For Ruby Lovers  ruby -e  puts ARGF map  amp  to i  inject  amp      numbers txt

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Paste typically merges lines of multiple files  but it can also be used to convert individual lines of a file into a single line   The delimiter flag allows you to pass a x x type equation to bc   paste -s -d  infile   bc   Alternatively  when piping from stdin    lt commands gt    paste -s -d  -   bc

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You can do it in python  if you feel comfortable   Not tested  just typed   out   open  filename   read    lines   out split   n   ints   map int  lines  s   sum ints  print s   Sebastian pointed out a one liner script   cat filename   python -c from fileinput import input  print sum map int  input

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Real-time summing to let you monitor progress of some number-crunching task     cat numbers txt  1 2 3 4 5 6 7 8 9 10    cat numbers txt   while read new  do total     total    new    echo  total  done 1 3 6 10 15 21 28 36 45 55    There is no need to set  total to zero in this case  Neither you can access  total after the finish

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My fifteen cents      cat file txt   xargs    sed -e  s      g    bc   Example     cat text 1 2 3 3 4 5 6 78 9 0 1 2 3 4 576 7 4444   cat text   xargs    sed -e  s      g    bc  5148

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perl -lne   x        END   print  x      lt  infile txt

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The following works in bash   I 0  for N in  cat numbers txt  do     I  expr  I    N  done  echo  I

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The following works in bash   I 0  for N in  cat numbers txt  do     I  expr  I    N  done  echo  I

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You can do it with Alacon - command-line utility for Alasql database   It works with Node js  so you need to install Node js and then Alasql package   To calculate sum from stdin you can use the following command    gt  cat data txt   node alacon  SELECT VALUE SUM  0   FROM TXT     gt b txt

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perl -lne   x        END   print  x      lt  infile txt

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Pure and short bash   f   cat numbers txt  echo       f     n

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I think AWK is what you are looking for   awk   sum   1 END print sum     You can use this command either by passing the numbers list through the standard input or by passing the file containing the numbers as a parameter

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Pure and short bash   f   cat numbers txt  echo       f     n

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Plain bash     cat numbers txt  1 2 3 4 5 6 7 8 9 10   sum 0  while read num  do   sum    num    done  lt  numbers txt  echo  sum 55

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sed  s        infile   bc   tail -1

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The following works in bash   I 0  for N in  cat numbers txt  do     I  expr  I    N  done  echo  I

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The following should work  assuming your number is the second field on each line    awk  BEGIN  sum 0      sum sum    2    END  print  tot    sum   Yourinputfile txt

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dc -f infile -e    z1 lt r srz1 lt rp    Note that negative numbers prefixed with minus sign should be translated for dc  since  it uses   prefix rather than - prefix for that  For example  via tr  -        dc -f- -e         Edit  Since this answer got so many votes  for obscurity   here is a detailed explanation   The expression   z1 lt r srz1 lt rp does the following       interpret everything to the next   as a string       push two values off the stack  add them and push the result   z   push the current stack depth   1   push one    lt r  pop two values and execute register r if the original top-of-stack  1        is smaller     end of the string  will push the whole thing to the stack sr  pop a value  the string above  and store it in register r z   push the current stack depth again 1   push 1  lt r  pop two values and execute register r if the original top-of-stack  1      is smaller p   print the current top-of-stack   As pseudo-code    Define  add top of stack  as    Remove the two top values off the stack and add the result back If the stack has two or more values  run  add top of stack  recursively  If the stack has two or more values  run  add top of stack  Print the result  now the only item left in the stack   To really understand the simplicity and power of dc  here is a working Python script that implements some of the commands from dc and executes a Python version of the above command       Implement some commands from dc registers     r   None  stack      def add        stack append stack pop     stack pop    def z        stack append len stack   def less reg       if stack pop    lt  stack pop            registers reg    def store reg       registers reg    stack pop   def p        print stack -1       Python version of the dc command above    The equivalent to -f  read a file and push every line to the stack import fileinput for line in fileinput input        stack append int line strip      def cmd        add       z       stack append 1      less  r    stack append cmd  store  r   z   stack append 1  less  r   p

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The following should work  assuming your number is the second field on each line    awk  BEGIN  sum 0      sum sum    2    END  print  tot    sum   Yourinputfile txt

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Plain bash one liner    cat  gt   tmp test 1  2  3  4  5  D    echo       cat  tmp test   tr   n        0

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Paste typically merges lines of multiple files  but it can also be used to convert individual lines of a file into a single line   The delimiter flag allows you to pass a x x type equation to bc   paste -s -d  infile   bc   Alternatively  when piping from stdin    lt commands gt    paste -s -d  -   bc

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Bit of awk should do it    awk   s   1  END  print s   mydatafile   Note  some versions of awk have some odd behaviours if you are going to be adding anything exceeding 2 31  2147483647   See comments for more background  One suggestion is to use printf rather than print   awk   s   1  END  printf    0f   s   mydatafile

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I realize this is an old question  but I like this solution enough to share it     cat  gt  numbers txt 1  2  3  4  5  D   cat numbers txt   perl -lpe   c          c  15   If there is interest  I ll explain how it works

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Alternative pure Perl  fairly readable  no packages or options required   perl -e  map   x         lt  gt  and print  x   lt  infile txt

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BASH solution  if you want to make this a command  e g  if you need to do this frequently     addnums        local total 0   while read val  do        total    val      done   echo  total     Then usage    addnums  lt   tmp nums

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Apologies in advance for readability of the backticks        but these work in shells other than bash and are thus more pasteable   If you use a shell which accepts it  the   command      format is much more readable  and thus debuggable  than  command      so feel free to modify for your sanity   I have a simple function in my bashrc that will use awk to calculate a number of simple math items  calc      awk  BEGIN print               This will do   -         sqrt sin cos  parenthesis      and more depending on your version of awk      you could even get fancy with printf and format floating point output  but this is all I normally need  for this particular question  I would simply do this for each line   calc  echo      tr            so the code block to sum each line would look something like this   while read LINE        LINE     do   calc  echo   LINE  tr           you may want to filter out some lines with a case statement here done   That s if you wanted to only sum them line by line   However for a total of every number in the datafile  VARS   lt datafile  calc  echo   VARS          btw if I need to do something quick on the desktop  I use this   xcalc        A  calc         A  Xdialog --stdout --inputbox  Simple calculator  0 0  A       A    amp  amp  xcalc  A

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cat n 2 4 2 7 8 9     perl -MList  Util -le  print List  Util  sum  lt  gt     lt  n 32   Or  you can type in the numbers on the command line     perl -MList  Util -le  print List  Util  sum  lt  gt    1 3 5  D 9   However  this one slurps the file so it is not a good idea to use on large files  See j random hacker s answer which avoids slurping

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cat n 2 4 2 7 8 9     perl -MList  Util -le  print List  Util  sum  lt  gt     lt  n 32   Or  you can type in the numbers on the command line     perl -MList  Util -le  print List  Util  sum  lt  gt    1 3 5  D 9   However  this one slurps the file so it is not a good idea to use on large files  See j random hacker s answer which avoids slurping

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I think AWK is what you are looking for   awk   sum   1 END print sum     You can use this command either by passing the numbers list through the standard input or by passing the file containing the numbers as a parameter

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dc -f infile -e    z1 lt r srz1 lt rp    Note that negative numbers prefixed with minus sign should be translated for dc  since  it uses   prefix rather than - prefix for that  For example  via tr  -        dc -f- -e         Edit  Since this answer got so many votes  for obscurity   here is a detailed explanation   The expression   z1 lt r srz1 lt rp does the following       interpret everything to the next   as a string       push two values off the stack  add them and push the result   z   push the current stack depth   1   push one    lt r  pop two values and execute register r if the original top-of-stack  1        is smaller     end of the string  will push the whole thing to the stack sr  pop a value  the string above  and store it in register r z   push the current stack depth again 1   push 1  lt r  pop two values and execute register r if the original top-of-stack  1      is smaller p   print the current top-of-stack   As pseudo-code    Define  add top of stack  as    Remove the two top values off the stack and add the result back If the stack has two or more values  run  add top of stack  recursively  If the stack has two or more values  run  add top of stack  Print the result  now the only item left in the stack   To really understand the simplicity and power of dc  here is a working Python script that implements some of the commands from dc and executes a Python version of the above command       Implement some commands from dc registers     r   None  stack      def add        stack append stack pop     stack pop    def z        stack append len stack   def less reg       if stack pop    lt  stack pop            registers reg    def store reg       registers reg    stack pop   def p        print stack -1       Python version of the dc command above    The equivalent to -f  read a file and push every line to the stack import fileinput for line in fileinput input        stack append int line strip      def cmd        add       z       stack append 1      less  r    stack append cmd  store  r   z   stack append 1  less  r   p

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My fifteen cents      cat file txt   xargs    sed -e  s      g    bc   Example     cat text 1 2 3 3 4 5 6 78 9 0 1 2 3 4 576 7 4444   cat text   xargs    sed -e  s      g    bc  5148

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Plain bash     cat numbers txt  1 2 3 4 5 6 7 8 9 10   sum 0  while read num  do   sum    num    done  lt  numbers txt  echo  sum 55

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I would put a big WARNING on the commonly approved solution   awk   s   1  END  print s   mydatafile   DO NOT USE THIS     that is because in this form awk uses a 32 bit signed integer representation  it will overflow for sums that exceed 2147483647  i e   2 31    A more general answer  for summing integers  would be   awk   s   1  END  printf    0f n   s   mydatafile   USE THIS INSTEAD

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include  lt iostream gt   int main         double x   0  total   0      while  std  cin  gt  gt  x          total    x      if   std  cin eof            return 1      std  cout  lt  lt  x  lt  lt    n

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Using the GNU datamash util   seq 10   datamash sum 1   Output   55     If the input data is irregular  with spaces and tabs at odd places  this may confuse datamash  then either use the -W switch    lt commands    gt    datamash -W sum 1      or use tr to clean up the whitespace    lt commands    gt    tr -d     blank       datamash sum 1

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Ok  here is how to do it in PowerShell  PowerShell core  should work on Windows  Linux and Mac   Get-Content aaa dat   Measure-Object -Sum

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One-liner in Racket   racket -e   define  g   define i  read    if  eof-object  i  empty  cons i  g      foldr   0  g     lt  numlist txt

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Paste typically merges lines of multiple files  but it can also be used to convert individual lines of a file into a single line   The delimiter flag allows you to pass a x x type equation to bc   paste -s -d  infile   bc   Alternatively  when piping from stdin    lt commands gt    paste -s -d  -   bc

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Just for completeness  there is also an R solution  seq 1 10   R -q -e  f  lt - file  stdin    open f   cat sum as numeric readLines f

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A lua interpreter is present on all fedora-based systems  fedora RHEL CentOS korora etc  because it is embedded with rpm-package the package of package manager rpm   i e rpm-lua  and if u want to learn lua this kind of problems are ideal you ll get your job done as well    cat filname   lua -e  sum   0 for i in io lines   do sum sum i end print sum     and it works  Lua is verbose though  you might have to endure some repeated keyboard stroke injury

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include  lt iostream gt   int main         double x   0  total   0      while  std  cin  gt  gt  x          total    x      if   std  cin eof            return 1      std  cout  lt  lt  x  lt  lt    n

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Plain bash     cat numbers txt  1 2 3 4 5 6 7 8 9 10   sum 0  while read num  do   sum    num    done  lt  numbers txt  echo  sum 55

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C  not simplified   seq 1 10   tcc -run  lt  cat  lt  lt  EOF  include  lt stdio h gt  int main int argc  char   argv        int sum   0      int i   0      while scanf   d    amp i     1            sum   sum   i            printf   d n   sum       return 0    EOF

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Bit of awk should do it    awk   s   1  END  print s   mydatafile   Note  some versions of awk have some odd behaviours if you are going to be adding anything exceeding 2 31  2147483647   See comments for more background  One suggestion is to use printf rather than print   awk   s   1  END  printf    0f   s   mydatafile

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C  not simplified   seq 1 10   tcc -run  lt  cat  lt  lt  EOF  include  lt stdio h gt  int main int argc  char   argv        int sum   0      int i   0      while scanf   d    amp i     1            sum   sum   i            printf   d n   sum       return 0    EOF

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You can use your preferred  expr  command you just need to finagle the input a little first   seq 10   tr    n         sed -e  s       g  -e s       n     xargs expr   The process is     tr  replaces the eoln characters with a   symbol   sed pads the     with spaces on each side  and then strips the final   from the line xargs inserts the piped input into the command line for expr to consume

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One-liner in Rebol   rebol -q --do  s  0 while  d  input   s  s   to-integer d  print s   lt  infile txt   Unfortunately the above doesn t work in Rebol 3 just yet  INPUT doesn t stream STDIN      So here s an interim solution which also works in Rebol 3   rebol -q --do  s  0 foreach n to-block read  infile txt  s  s   n  print s

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sed  s        infile   bc   tail -1

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Plain bash     cat numbers txt  1 2 3 4 5 6 7 8 9 10   sum 0  while read num  do   sum    num    done  lt  numbers txt  echo  sum 55

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The one-liner version in Python     python -c  import sys  print sum int l  for l in sys stdin

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Cannot avoid submitting this  jot 1000000   sed  2  s       s   p     dc  It is found over here  Most elegant unix shell one-liner to sum list of numbers of arbitrary precision  And here are its special advantages over awk  bc and friends   it does not depend on buffering and thus does not choke with really big inputs it implies no particular precision -or integer size for that matter- limits  hello AWK   no need for different code  if floating point numbers need to be added

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With jq   seq 10   jq -s  add     add  is equivalent to  reduce     as  item  0       item

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My version   seq -5 10   xargs printf  - -  s    xargs    bc

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For Ruby Lovers  ruby -e  puts ARGF map  amp  to i  inject  amp      numbers txt

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Cannot avoid submitting this  jot 1000000   sed  2  s       s   p     dc  It is found over here  Most elegant unix shell one-liner to sum list of numbers of arbitrary precision  And here are its special advantages over awk  bc and friends   it does not depend on buffering and thus does not choke with really big inputs it implies no particular precision -or integer size for that matter- limits  hello AWK   no need for different code  if floating point numbers need to be added

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The one-liner version in Python     python -c  import sys  print sum int l  for l in sys stdin

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I realize this is an old question  but I like this solution enough to share it     cat  gt  numbers txt 1  2  3  4  5  D   cat numbers txt   perl -lpe   c          c  15   If there is interest  I ll explain how it works

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BASH solution  if you want to make this a command  e g  if you need to do this frequently     addnums        local total 0   while read val  do        total    val      done   echo  total     Then usage    addnums  lt   tmp nums

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Using env variable tmp  tmp awk -v tmp   tmp    print  tmp    1    lt filename gt  echo  tmp sed  s     g  bc  tmp cat  lt filename gt  awk -v tmp   tmp    print  tmp    1   echo  tmp sed  s     g  bc   Thanks

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Plain bash one liner    cat  gt   tmp test 1  2  3  4  5  D    echo       cat  tmp test   tr   n        0

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dc -f infile -e    z1 lt r srz1 lt rp    Note that negative numbers prefixed with minus sign should be translated for dc  since  it uses   prefix rather than - prefix for that  For example  via tr  -        dc -f- -e         Edit  Since this answer got so many votes  for obscurity   here is a detailed explanation   The expression   z1 lt r srz1 lt rp does the following       interpret everything to the next   as a string       push two values off the stack  add them and push the result   z   push the current stack depth   1   push one    lt r  pop two values and execute register r if the original top-of-stack  1        is smaller     end of the string  will push the whole thing to the stack sr  pop a value  the string above  and store it in register r z   push the current stack depth again 1   push 1  lt r  pop two values and execute register r if the original top-of-stack  1      is smaller p   print the current top-of-stack   As pseudo-code    Define  add top of stack  as    Remove the two top values off the stack and add the result back If the stack has two or more values  run  add top of stack  recursively  If the stack has two or more values  run  add top of stack  Print the result  now the only item left in the stack   To really understand the simplicity and power of dc  here is a working Python script that implements some of the commands from dc and executes a Python version of the above command       Implement some commands from dc registers     r   None  stack      def add        stack append stack pop     stack pop    def z        stack append len stack   def less reg       if stack pop    lt  stack pop            registers reg    def store reg       registers reg    stack pop   def p        print stack -1       Python version of the dc command above    The equivalent to -f  read a file and push every line to the stack import fileinput for line in fileinput input        stack append int line strip      def cmd        add       z       stack append 1      less  r    stack append cmd  store  r   z   stack append 1  less  r   p

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You can using num-utils  although it may be overkill for what you need  This is a set of programs for manipulating numbers in the shell  and can do several nifty things  including of course  adding them up  It s a bit out of date  but they still work and can be useful if you need to do something more   http   suso suso org programs num-utils

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and the PHP version  just for the sake of completeness  cat  file with numbers   php -r   s   0  while  true     e   fgets STDIN   if  false      e  break   s     e    echo  s

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Using env variable tmp  tmp awk -v tmp   tmp    print  tmp    1    lt filename gt  echo  tmp sed  s     g  bc  tmp cat  lt filename gt  awk -v tmp   tmp    print  tmp    1   echo  tmp sed  s     g  bc   Thanks

[shell] Shell command to sum integers, one per line?

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