gmp_pow()
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Raise number into power
说明
gmp_pow(GMP$base,int $exp): GMP
Raise$baseinto power$exp.
参数
- $base
The base number.
可以是一个 GMP数据resouce,或一个可以转换为数值的字符串。
- $exp
The positive power to raise the$base.
返回值
The new(raised)number, as a GMP number. The case of0^0yields 1.
范例
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"; ?>
以上例程会输出:
2147483648 1
A Sample code can be shown as <?php echo gmp_strval(gmp_pow(4,4)); //This would give the answer as 256 ?>