= 4.0.4, PHP 5, PHP 7, PHP 8)gmp_fact — Factorial說(shuō)明gmp_fact(GMP|int|string $num): GMPCalculates factorial (num!) of num. 參數(shù)numThe fact">

gmp_fact

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_factFactorial

說(shuō)明

gmp_fact(GMP|int|string $num): GMP

Calculates factorial (num!) of num.

參數(shù)

num

The factorial number.

GMP 對(duì)象或 int ,或數(shù)字string

返回值

GMP 對(duì)象。

范例

示例 #1 gmp_fact() example

<?php
$fact1 
gmp_fact(5); // 5 * 4 * 3 * 2 * 1
echo gmp_strval($fact1) . "\n";

$fact2 gmp_fact(50); // 50 * 49 * 48, ... etc
echo gmp_strval($fact2) . "\n";
?>

以上例程會(huì)輸出:

120
30414093201713378043612608166064768844377641568960512000000000000