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# gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5)

gmp_sqrt -- Calculate square root

## Description

resource gmp_sqrt ( resource a )

Calculates square root of a and returns the integer portion of the result.

範例 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 printout of the above program will be:

    3
    2
    1234567890

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