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# xor(+Number1, +Number2, -Result)

Evaluates the bitwise exclusive disjunction Number1 xor Number2 and unifies
the resulting value with Result.
*Number1*
- Integer.
*Number2*
- Integer.
*Result*
- Output: integer.

## Description

This predicate is used by the ECLiPSe compiler to expand evaluable
arithmetic expressions. So the call to xor(Number1, Number2, Result) is
equivalent to
Result is xor(Number1, Number2)

which should be preferred for portability.
In coroutining mode, if Number1 or Number2 are uninstantiated, the call
to xor/3 is delayed until these variables are instantiated.

### Modes and Determinism

### Exceptions

*(4) instantiation fault *
- Number1 or Number2 is not instantiated (non-coroutining mode only).
*(5) type error *
- Number1 or Number2 is a number but not an integer.
*(24) number expected *
- Number1 or Number2 is not of a numeric type.

## Examples

Success:
Result is xor(11, 7). % gives Result = 12
Result is xor(11, -7). % gives Result = -14
Error:
Result is xor(6, 2.0). % type error

## See Also

is / 2