Php/docs/function.expm1
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expm1
(PHP 4 >= 4.1.0, PHP 5, PHP 7)
expm1 — Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
Description
expm1
( float $arg
) : float
expm1() returns the equivalent to
'exp(arg) - 1' computed in a way that is
accurate even if the value of arg is near zero,
a case where 'exp (arg) - 1' would be
inaccurate due to subtraction of two numbers that are nearly equal.
Parameters
arg- The argument to process
Return Values
'e' to the power of arg minus one
