[ Arithmetic | The ECLiPSe Built-In Predicates | Reference Manual | Alphabetic Index ]

# /\(+Number1, +Number2, -Result)

Evaluates the bitwise conjunction Number1 /\ Number2 and unifies the resulting value with Result.

Number1
  Integer.
Number2
  Integer.
Result
  A variable or integer.

## Description

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

        Result is Number1 /\ Number2

which should be preferred for portability.

This operation behaves as if operating on an unlimited length two's complement representation.

In coroutining mode, if Number1 or Number2 are uninstantiated, the call to /\/3 is delayed until these variables are instantiated.

### Modes and Determinism

- /\(+, +, -) is det

### Exceptions

(4) instantiation fault
  Number1 or Number2 is not instantiated (non-coroutining mode only).
(5) type error
  Result is a number but not an integer.
(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.
(24) number expected
  Result is neither a number nor a variable.

## Examples

    Success:
          /\(11, 7, 3).
          /\(-11, 7, Result).       (gives Result = 5)
    Fail:
          /\(1, 2, 3).
    Error:
          /\(A, 2, 6).              (Error 4).
          /\(5, 2, r).              (Error 5).
          /\(6, 2.0, 2.0).          (Error 5).
          /\(4 + 2, 2, 2).          (Error 24).

## See Also

is / 2