Math 함수 목록
PHP Manual

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

설명

float log1p ( float $number )

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.

인수

number

The argument to process

반환값

log(1 + number)

변경점

버전 설명
5.3.0 This function is now available on all platforms

참고


Math 함수 목록
PHP Manual