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