How do I divide in the Linux console

Question

I have to variables and I want to find the value of one divided by the other  What commands should I use to do this

User · Answer

In the bash shell  surround arithmetic expressions with                echo     7   3    2   Although I think you are limited to integers

User · Answer

Better way is to use  bc   an arbitrary precision calculator   variable   echo  OPTIONS  OPERATIONS    bc    ex    my var   echo  scale 5   temp var 100    temp var2    bc    where  scale 5  is accuracy   man bc    comes with several usage examples

User · Answer

Example of integer division using bash to divide  a by  b   echo    a b

User · Answer

you can also use perl -e  perl -e  print 67 8

User · Answer

You can use awk which is a utility language designed for data extraction  e g  for 1 2 3 4   gt echo 1 2 3 4   awk    print  2  1    0 352941

User · Answer

I also had the same problem  It s easy to divide integer numbers but decimal numbers are not that easy  if you have 2 numbers like 3 14 and 2 35 and divide the numbers then  the code will be Division echo 3 14   2 35   bc                        echo   Division  the quotes are different  Don t be confused  it s situated just under the esc button on your keyboard   THE ONLY DIFFERENCE IS THE   bc and also here echo works as an operator for the arithmetic calculations in stead of printing  So  I had added  echo   Division  for printing the value  Let me know if it works for you  Thank you

User · Answer

Something else you could do using raytrace s answer  You could use the stdout of another shell call using backticks to then do some calculations  For instance I wanted to know the file size of the top 100 lines from a couple of files  The original size from wc -c is in bytes  I want to know kilobytes  Here s what I did   echo  cat     head -n 100   wc -c    1024   bc -l

User · Answer

You should try to use   echo  scale 4  variablename 3  bc

User · Answer

I assume that by Linux console you mean Bash   If X and Y are your variables      X    Y   returns what you ask for

User · Answer

echo 5 2   bc -l   2 50000000000000000000  this  -l  option in  bc  allows floating results

User · Answer

I still prefer using dc  which is an RPN calculator  so quick session to divide 67 by 18 with 4 digits precision would look like   gt dc 4k 67 18 p 3 7222 q  gt    Obviously  much more available  man dc

User · Answer

In bash  if you don t need decimals in your division  you can do    gt echo    5 6   11  gt echo    10 2   5  gt echo    10 3   3

[linux] How do I divide in the Linux console?

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