gmp_sqrt

(PHP 4 >= 4.0.4, PHP 5)

gmp_sqrt — Calculate square root

说明

resource gmp_sqrt ( resource $a )

Calculates square root of a .

参数

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.

返回值

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

范例

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";
?>

上例将输出：

3
2
1234567890


	PHP5中文手册 gmp_sign gmp_sqrtrem GMP PHP Manual gmp_sqrt (PHP 4 >= 4.0.4, PHP 5) gmp_sqrt — Calculate square root 说明 resource gmp_sqrt ( resource `$a` ) Calculates square root of `a` . 参数 `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. 返回值 The integer portion of the square root, as a GMP number. 范例 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"; ?>` 上例将输出： 3 2 1234567890 gmp_sign gmp_sqrtrem GMP PHP Manual