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gmp_fact
(PHP 4 >= 4.0.4, PHP 5)
gmp_fact — Factorial
Description
resource gmp_fact
( int $a
)
Calculates factorial (a!) of a .
Parameters
- a
-
The factorial number.
It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.
Return Values
A GMP number resource.
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
