[Tutor] xor

[Paul Sidorsky]

Terje Johan Abrahamsen wrote:

> What does really xor do? I tried an example,
> >>>  30^76
> 82
> 
> ^ means xor if I am completely wrong. I don't see any connection between the
> numbers. Can anyone explain?

XOR works on the binary level.  x XOR y is true if and only if x != y,
where x and y are binary digits (bits).  So if we convert your example
to binary, it makes sense:

  0011110 = 30
^ 1001100 = 76
--------------
  1010010 = 82

-- 
======================================================================
Paul Sidorsky                                          Calgary, Canada
paulsid@shaw.ca                        http://members.shaw.ca/paulsid/