expm1

expm1

Returns exp($num) - 1, computed in a way that is accurate even when the value of number is close to zero

float **expm1** float $num

returns the equivalent to
computed in a way that is

accurate even if the value of is near zero, a case where would be inaccurate due to subtraction of two numbers that are nearly equal. expm1``exp($num) - 1``num``exp($num) - 1

numThe argument to process

to the power of , minus one.

e``num

log1p``exp