Binary numbers in Python

Question

How can I add  subtract  and compare binary numbers in Python without converting to decimal

User · Answer

x   x   1 print x  a   x   5 print a

User · Answer

Binary  decimal  hexadecimal    the base only matters when reading or outputting numbers  adding binary numbers is just the same as adding decimal number   it is just a matter of representation

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If you re talking about bitwise operators  then you re after     Not   XOR   Or  amp  And   Otherwise  binary numbers work exactly the same as decimal numbers  because numbers are numbers  no matter how you look at them  The only difference between decimal and binary is how we represent that data when we are looking at it

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I think you re confused about what binary is   Binary and decimal are just different representations of a number - e g  101 base 2 and 5 base 10 are the same number   The operations add  subtract  and compare operate on numbers - 101 base 2    5 base 10 and addition is the same logical operation no matter what base you re working in   The fact that your python interpreter may store things as binary internally doesn t affect how you work with it - if you have an integer type  just use    -  etc   If you have strings of binary digits  you ll have to either write your own implementation or convert them using the int binaryString  2  function

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Below is a re-write of a previously posted function    def addBinary a  b     Example  a    11    b    100  returns as  111           for ch in a  assert ch in   0   1     bad digit      ch         for ch in b  assert ch in   0   1     bad digit      ch         sumx   int a  2    int b  2          return bin sumx  2

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Not sure if helpful  but I leave my solution here   class Solution         param A   string        param B   string        return a strings     def addBinary self  A  B           num1   bin int A  2           num2   bin int B  2           bin str   bin int num1  2  int num2  2           b index   bin str index  b           return bin str b index 1    s   Solution   print s addBinary  11    100

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I expect the intent behind this assignment was to work in binary string format  This is absolutely doable       def compare bin1  bin2       return bin1 lstrip  0      bin2 lstrip  0    def add bin1  bin2       result          blen   max  len bin1   len bin2      1     bin1  bin2   bin1 zfill blen   bin2 zfill blen      carry s    0      for b1  b2 in list zip bin1  bin2     -1           count    carry s  b1  b2  count  1           carry s    1  if count  gt   2 else  0          result     1  if count   2 else  0      return result   -1   if   name         main         print add  101    100      I leave the subtraction func as an exercise for the reader

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You can convert between a string representation of the binary using bin   and int     gt  gt  gt  bin 88   0b1011000   gt  gt  gt  int  0b1011000   2  88  gt  gt  gt     gt  gt  gt  a int  01100000   2   gt  gt  gt  b int  00100110   2   gt  gt  gt  bin a  amp  b   0b100000   gt  gt  gt  bin a   b   0b1100110   gt  gt  gt  bin a   b   0b1000110

User · Answer

I think you re confused about what binary is  Binary and decimal are just different representations of a number - e g  101 base 2 and 5 base 10 are the same number  The operations add  subtract  and compare operate on numbers - 101 base 2    5 base 10 and addition is the same logical operation no matter what base you re working in

[python] Binary numbers in Python

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