GMP_FACT(3) 1 GMP_FACT(3)
gmp_fact - Factorial
SYNOPSIS
GMP gmp_fact (mixed $a)
DESCRIPTION
Calculates factorial ( a!) of $a.
PARAMETERS
o $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 number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.
EXAMPLES
Example #1
gmp_fact(3) example
<?php
$fact1 = gmp_fact(5); // 5 * 4 * 3 * 2 * 1
echo gmp_strval($fact1) . "
";
$fact2 = gmp_fact(50); // 50 * 49 * 48, ... etc
echo gmp_strval($fact2) . "
";
?>
The above example will output:
120
30414093201713378043612608166064768844377641568960512000000000000
PHP Documentation Group GMP_FACT(3)
