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log1p

PHP function Edit on GitHub ✎

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

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

Description

log1p(float $num): float

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

Parameters

num

The argument to process

Return Values

log(1 + num)

See Also

Source: reference/math/functions/log1p.xml · from the official PHP manual (php/doc-en)