PHP pow () function
Examples
pow () Examples:
<?php
echo(pow(2,4) . "<br>");
echo(pow(-2,4) . "<br>");
echo(pow(-2,-4) . "<br>");
echo(pow(-2,-3.2));
?>
echo(pow(2,4) . "<br>");
echo(pow(-2,4) . "<br>");
echo(pow(-2,-4) . "<br>");
echo(pow(-2,-3.2));
?>
Running instance »
Definition and Usage
pow () function returns x to the power y.
grammar
pow( x,y );
参数 | 描述 |
---|---|
x | 必需。规定要使用的底。 |
y | 必需。规定指数。 |
technical details
return value: | x to the power of y. |
---|---|
Return type: | If possible, return Integer, otherwise Float. |
PHP version: | 4+ |
PHP Update Log: | PHP 4.0.6: If possible returns integer. The previous version only returns float. PHP 4.2.0: If an error occurs in any of the warning will not be generated. |
PHP Math Reference