gmp_fact
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
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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https://www.php.net/manual/en/function.gmp-fact.php