sqrt
sqrt
(PHP 4, PHP 5, PHP 7)
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 ... ?>
See Also
- pow() - Exponential expression
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.sqrt.php
