GMP Functions
PHP Manual

gmp_fact

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

gmp_factFactorial

Description

GMP gmp_fact ( mixed $a )

Calculates factorial (a!) of a.

Parameters

a

The factorial number.

Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.

Return Values

A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.

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


GMP Functions
PHP Manual

copyright  ©  November 16 2019 sean dreilinger url: https://durak.org/sean/pubs/software/php-7.0.0/function.gmp-fact.html