    gmp_fact (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
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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