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 numeric string.

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

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