PHP5中文手册·Raise number into power -- 追寻梦想＞编程乐园＞PHP 编程

说明

resource gmp_pow ( resource $base , int $exp )

Raise base into power exp .

参数

base

The base number.

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

exp

The positive power to raise the base .

返回值

The new (raised) number, as a GMP number. The case of 0^0 yields 1.

范例

Example#1 gmp_pow() example


<?php
$pow1 = gmp_pow("2", 31);
echo gmp_strval($pow1) . "\n";
$pow2 = gmp_pow("0", 0);
echo gmp_strval($pow2) . "\n";
$pow3 = gmp_pow("2", -1); // Negative exp, generates warning
echo gmp_strval($pow3) . "\n";
?>

上例将输出：

2147483648
1


	PHP5中文手册 gmp_popcount gmp_powm GMP PHP Manual gmp_pow (PHP 4 >= 4.0.4, PHP 5) gmp_pow — Raise number into power 说明 resource gmp_pow ( resource `$base` , int `$exp` ) Raise `base` into power `exp` . 参数 `base` The base number. It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. `exp` The positive power to raise the `base` . 返回值 The new (raised) number, as a GMP number. The case of 0^0 yields 1. 范例 Example#1 gmp_pow() example `<?php $pow1 = gmp_pow("2", 31); echo gmp_strval($pow1) . "\n"; $pow2 = gmp_pow("0", 0); echo gmp_strval($pow2) . "\n"; $pow3 = gmp_pow("2", -1); // Negative exp, generates warning echo gmp_strval($pow3) . "\n"; ?>` 上例将输出： 2147483648 1 gmp_popcount gmp_powm GMP PHP Manual