log1p

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

Description

float log1p(float $num)

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

  • expm1
  • log
  • log10