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 ...
?>

See Also

     

 

 
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