log() function in PHP

The log() function returns the natural logarithm of a number.

Syntax

log(num, base)

Parameter

• num-The value to calculate the logarithm for

• Base-Logarithm Base

Return

The log() function returns the natural logarithm of a number.

Example

<?php
　　　echo(log(1));
?>

Output Result

0

Example

Let's look at another example-

<?php
　　　echo(log(0));
?>

Output Result

-INF

Example

Let's look at another example-

<?php
　　　echo(log(10));
　　　echo(log(2.7));
?>

Output Result

2.3025850929940.99325177301028