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

# fix(+Number, -Result)

Unifies the integer part of Number with Result (Truncation towards zero).

Number
  A number.
Result
  A variable or integer.

## Description

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

        Result is fix(Number)

which should be preferred for portability.

This function is deprecated. For clearer code, please use

        Result is integer(truncate(Number)).

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

### Modes and Determinism

- fix(+, -) is det

### Exceptions

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

## Examples

    Success:
          fix(1.5, 1).
          fix(-6.4, -6).
    Fail:
          fix(1, 0).
    Error:
          fix(A, 6.0).                 (Error 4).
          fix(0.0, 0.0).               (Error 5).
          fix(4 + 2.3, 6).             (Error 24).
          fix(1, r).                   (Error 24).

## See Also

is / 2, integer / 2, truncate / 2, floor / 2, ceiling / 2, round / 2