sqrt
(PHP 4, PHP 5)
sqrt — Square root
Description
float sqrt
( float $arg
)
Returns the square root of arg.
Parameters
- arg
-
The argument to process
Return Values
The square root of arg or the special value NAN for negative numbers.
Examples
Example #1 sqrt() example
<?php
// Precision depends on your precision directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>