PYTHON log

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Python replacement for PHP's log [ edit | history ]

import math
math.log(arg)
math.log(arg, base) # Python 2.3+

PHP log

PHP original manual for log [ show | php.net ]

(PHP 4, PHP 5)

log — Natural logarithm

float log ( float $arg [, float $base= M_E ] )

If the optional base parameter is specified, log() returns log_basearg , otherwise log() returns the natural logarithm of arg .

arg: The value to calculate the logarithm for
base: The optional logarithmic base to use (defaults to 'e' and so to the natural logarithm).

The logarithm of arg to base , if given, or the natural logarithm.

Version	Description
Since 4.3.0	The optional parameter `base` became available. For older versions you can calculate the logarithm in base b of a number n, but using the mathematical identity: log_b(n) = log(n)/log(b), where log is the neperian (or natural) logarithm.