Php/docs/function.gmp-fact

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gmp_fact

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

gmp_factFactorial


Description

gmp_fact ( mixed $a ) : GMP

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 object.


Examples

Example #1 gmp_fact() example

<?php$fact1 = gmp_fact(5); // 5 * 4 * 3 * 2 * 1echo gmp_strval($fact1) . "\n";$fact2 = gmp_fact(50); // 50 * 49 * 48, ... etcecho gmp_strval($fact2) . "\n";?>

The above example will output:


120
30414093201713378043612608166064768844377641568960512000000000000