GMP Functions
PHP Manual

gmp_sqrt

Calculate square root

Description

resource gmp_sqrt ( resource $a )

Calculates square root of a.

Parameters

a

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

Return Values

The integer portion of the square root, as a GMP number.

Examples

Example #1 gmp_sqrt example

<?php
$sqrt1 = gmp_sqrt("9");
$sqrt2 = gmp_sqrt("7");
$sqrt3 = gmp_sqrt("1524157875019052100");

echo gmp_strval($sqrt1) . "\n";
echo gmp_strval($sqrt2) . "\n";
echo gmp_strval($sqrt3) . "\n";
?>

The above example will output:

3
2
1234567890