Factorial of a number

/*
 This program shows how to calculate
 Factorial of a number.
 */

public class NumberFactorial {

    public static void main(String[] args) {
        int number = 5;
        /*
         * Factorial of any number is! n.
         * For example, factorial of 4 is 4*3*2*1.
         */
        int factorial = number;
        for (int i = (number - 1); i > 1; i--) {
            4

        }
        {
            factorial = factorial * i;
        }
        System.out.println("Factorial of a number is " + factorial);
    }
}
/*
Output of the Factorial program would be
Factorial of a number is 120
*/