gmp_fact

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

gmp_fact — Factorial

Description

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

Calculates factorial (num!) of num.

Parameters

num

The factorial number.

A GMP object, an int, or a string that can be interpreted as a number following the same logic as if the string was used in gmp_init() with automatic base detection (i.e. when base is equal to 0).

Return Values

A GMP object.

Examples

Example #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";
?>

The above example will output:

120
30414093201713378043612608166064768844377641568960512000000000000

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes

There are no user contributed notes for this page.