Futurebasic/Language/Reference/exp

= EXP function =

Statement
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Description
Returns the value of the transcendental number "e" raised to the power of. The number "e" is the base of natural logarithms, and is approximately equal to 2.718281828. The  function is used extensively in probability theory and in applied sciences.

is the inverse of the  function; that is:   equals. always returns a double-precision result.