PHP  
downloads | documentation | faq | getting help | mailing lists | reporting bugs | php.net sites | links | my php.net 
search for in the  
<gmp_signgmp_sqrtrem>
Last updated: Mon, 16 Jul 2012

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.

例子 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



<gmp_signgmp_sqrtrem>
 Last updated: Mon, 16 Jul 2012
 
Copyright © 2001-2005 The PHP Group
All rights reserved.
This unofficial mirror is operated at: http://manual.phpv.net/
Last updated: Thu Jul 7 19:13:47 2005 CST