expm1

(PHP 4 >= 4.1.0, PHP 5)

expm1 --  Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero

Description

float expm1 ( float number )

Varning

Den h�r funktionen �r EXPERIMENTELL. Dess beteende, namnet p� den, och allt annat dokumenterat om den h�r funktionen kan �ndras i framtida utg�var av PHP. Anv�nd den p� egen risk.

expm1() returns the equivalent to 'exp(number) - 1' computed in a way that is accurate even if the value of number is near zero, a case where 'exp (number) - 1' would be inaccurate due to subtraction of two numbers that are nearly equal.

Not: Den h�r funktionen �r inte tillg�nglig under Windows.

See also log1p() and exp().