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# \(+Number, -Result)

Evaluates the bitwise complement of Number and unifies the resulting value
with Result.
*Number*
- Integer.
*Result*
- Output: integer.

## Description

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

which should be preferred for portability.
This operation behaves as if operating on an unlimited length two's
complement representation.

In coroutining mode, if Number is uninstantiated, the call to \/2 is
delayed until this variable is instantiated.

### Modes and Determinism

### Exceptions

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

## Examples

Success:
Result is \1. % gives Result = -2
Result is \5. % gives Result = -6
Result is \ -6. % gives Result = 5
Error:
Result is \0.0. % type error

## See Also

is / 2