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

Açıklama

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.

Değiştirgeler

arg

The argument to process

Dönen Değerler

'e' to the power of arg minus one

Sürüm Bilgisi

Sürüm: Açıklama
5.3.0 This function is now available on all platforms

Ayrıca Bakınız

  • log1p() - Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero
  • exp() - Calculates the exponent of e