September 2001
Intermediate to advanced
768 pages
32h 45m
English
Content preview from PHP Functions Essential Reference
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log
float log(float num) Calculates the natural logarithm of a number.
Returns:
Natural logarithm of a number
Description:
Calculates the natural logarithm of the number given by num . log() is the opposite of the exp() function.
Version:
PHP 3, PHP 4
See also:
exp() log10()
Example:
Calculate the natural logarithm of a number
$num = 54.5981; echo "The natural log of $num is ",log($num),"\n"; |
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