HH\Lib\Math\log

Requires the Hack Standard Library to be installed.

Facebook Engineer?

This function is available as Math\log() in Facebook's www repository.

Returns the logarithm base $base of $arg

namespace HH\Lib\Math;

function log(
  num $arg,
  ?num $base = NULL,
): float;

For the exponential function, see Math\exp().

Parameters