log1p

(PHP 4 >= 4.1.0, PHP 5, PHP 7)

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

Descrierea

log1p ( float $number ) : float

log1p() returns log(1 + number) computed in a way that is accurate even when the value of number is close to zero. log() might only return log(1) in this case due to lack of precision.

Parametri

number

The argument to process

Valorile întoarse

log(1 + number)

Istoricul schimbărilor

Versiune Descriere
5.3.0 This function is now available on all platforms

A se vedea și

  • expm1() - Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
  • log() - Natural logarithm
  • log10() - Base-10 logarithm