The bitwise exclusive or operator xor produces a result by comparing all 64 bits of its left and right operands, which must be expressions of type integer, one bit at a time. For each bit in the two operands, the corresponding bit in the result value is set to 1 if either operand's bit value is 1 and the other is 0 and set to 0 if both operand bit values are 0 or both are 1. In other words, the result bit is 1 if both bit values are different and 0 if they are the same.

The following illustrates this using 64-bit binary values.

Note that the expression a xor b yields the same result as not (a and b).