PHP: log() function
Description
The log() function returns the natural logarithm of a number.
Version:
(PHP 4 and above)
Syntax:
log(number,nbase)
Parameter:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| number | The value to calculate the logarithm. | Required | Float |
| nbase | The base to use. Default is 'e'. | Optional | Float |
Return value:
The logarithm of number to nbase, if given, or the natural logarithm.
Value Type: Float.
Example :
<?php
echo(log(2) . "<br />");
echo(log(1.234) . "<br />");
echo(log(0) . "<br />");
echo(log(1) . "<br />");
?>
Output :
0.69314718056 0.210260925483 -INF 0
View the example in the browser
See also
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https://w3resource.com/php/function-reference/log.php
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