Php/docs/function.gmp-fact
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gmp_fact
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_fact — Factorial
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.
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