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FutureBasic 5 
exp  statement  

result# = exp(expr)
expr
. The number "e" is the base of natural logarithms, and is approximately equal to 2.718281828. The exp
function is used extensively in probability theory and in applied sciences.exp
is the inverse of the log
function; that is: exp(log(x))
equals x
. exp
always returns a doubleprecision result.