How do I check if an integer is even or odd using bitwise operators

Question

How do I check if an integer is even or odd using bitwise operators

Answer 1

if (number & 1)
    number is odd
else // (number & 1) == 0
    number is even

For example, let's take integer 25, which is odd. In binary 25 is 00011001. Notice that the least significant bit b0 is 1.

00011001    
00000001   (00000001 is 1 in binary)
       &
--------
00000001