# gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_sqrt — Calculate square root

### Description

gmp_sqrt ( GMP `$a` ) : GMP

Calculates square root of `a`.

### Parameters

`a`

  Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided 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