Calculate square root

# gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_sqrt — Calculate square root

### Description

gmp_sqrt(GMP|int|string `$num`): GMP

Calculates square root of `num`.

### Parameters

`num`

  A GMP object, an int, or a string that can be interpreted as a number following the same logic as if the string was used in gmp_init() with automatic base detection (i.e. when `base` is equal to 0).

### 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

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