Computes the exponential of the argument (e raised to the power of the argument.) This produces slightly more accurate results than the equivalent expression e**(argument).
Format: Exp(exprn)
Arguments:
Return type: float
Error conditions: Returns 'Bottom' if exprn evaluates to 'Bottom'.
Example:
value = exp(4-var(0))
; Sets value to e raised to the quantity 4-var(0).