
abs(+Number, -Result)

   Unifies the absolute value of Number with Result.



Arguments
   Number              A number.
   Result              Output: a number.

Type
   Arithmetic

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

    Result is abs(Number)

   which should be preferred for portability.

   Result is the absolute value of Number, and of the same type.

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


Modes and Determinism
   abs(+, -) is det

Exceptions
     4 --- Number is not instantiated (non-coroutining mode only).
    24 --- Number is not of a numeric type.

Examples
   
    Result is abs(1).		% gives Result = 1
    Result is abs(-5).		% gives Result = 5
    Result is abs(-6.2).	% gives Result = 6.2

    Result is abs(-0.6__-0.5).	% gives Result = 0.5__0.6
    Result is abs(-0.2__0.1).	% gives Result = 0.0__0.2


See Also
   is / 2
