
exp(+Number, -Result)

   Evaluates the exponential function exp(Number) ("e to the power of Number")
and unifies the resulting value with Result.



Arguments
   Number              A number.
   Result              Output: float or breal.

Type
   Arithmetic

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

    Result is exp(Number)

    which should be preferred for portability.

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




Modes and Determinism
   exp(+, -) is det

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

Examples
   
    Result is exp(0.0).       % gives Result = 1.0
    Result is exp(-6).        % gives Result = 0.00247875


See Also
   is / 2
