PHP Program to Find Factorial of a Number using For loop

PHP program to find factorial of a number using for loop. In this article, you will learn how to make a php program to find factorial of a number using for loop.

Factorial Number Formula

Source Code

<?php
// PHP Program to Find Factorial of a Number using For loop

$x = 9;
$f = 1;
// $x - To store the input number
// $f - To store the factorial value

if ($x > 0) {
    for ($i = 1; $i <= $x; $i++) {
        $f *= $i;
    }
    echo "Factorial of " . $x . " = " . $f . "\n";
} else {
    echo "Sorry, The input number should be positive number& it's greater than 0!\n";
}

?>

Run Program

Output