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log1p> <lcg_value
[edit] Last updated: Fri, 10 Feb 2012

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log10

(PHP 4, PHP 5)

log10底が 10 の対数

説明

float log10 ( float $arg )

底を 10 とする arg の対数を返します。

パラメータ

arg

処理する引数。

返り値

底を 10 とする arg の対数を返します。

参考



add a note add a note User Contributed Notes log10
jphansen at uga dot edu 22-Jun-2011 12:31
Alternatively log(x, 10) may be used.
smalladi at lexgen dot com 20-Nov-2001 08:47
Note that log of a negative or undefined number returns -Infinity.

 
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