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The factorial of number n is multiplying given integer with the sequence of its descending positive integers. we denoted the factorial of a number n by n! in mathematics. Here I am writing factorial program in PHP..
Example :-
5! = 5*4*3*2*1 = 120
7! = 7*6*5*4*3*2*1 = 5040
Here are writing the PHP program to find a factorial of a number.
<?php
function factorial($number){
$factorial = 1;
for($x=$number;$x>=1;$x--){
$factorial = $factorial*$x;
}
return $factorial;
}
echo 'factorial is='.factorial(11);
?>
Output :- factorial is=3,99,16,800
Using the above program you can find the factorial of any positive integer in PHP.
