Thursday, 19 July 2012

Python Bitwise Operators:


Bitwise operator works on bits and performs bit by bit operation.
Assume if a=60; and b = 13; Now in binary format they will be as follows:
a = 0011 1100
b = 0000 1101
---------------------------------
a&b = 0000 1100
a|b = 0011 1101
a^b = 0011 0001
~a = 1100 0011

Operator
Description
Example
&
Binary AND Operator copies a bit to the result if it exists in both operands.
(a & b) will give 12 which is  0000 1100
|
Binary OR Operator copies a bit if it exists in either operand.
(a | b) will give 61 which is 0011 1101
^
Binary XOR Operator copies the bit if it is set in one operand but not both.
(a ^ b) will give 49 which is  0011 0001
~
Binary Ones Complement operator is unary and has the effect of ‘flipping’ bits.
(~a) will give -60 which is 1100 0011
<<
Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.
a << 2 will give 240 which is 1111 0000
>> 
Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.
a >> 2 will give 15 which is  0000 1111

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