gmp_fact

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

gmp_fact — Factorial

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gmp_fact ( mixed $a ) : GMP

Calculates factorial (a!) of a.

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a

The factorial number.

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GMP 锟斤拷值锟斤拷源.

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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";
?>

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