Write a Java program to calculate a Factorial of a number

 //Write a Java program to calculate a Factorial of a number

import java.util.Scanner;

public class Facto{

    public static void main(String[] args)

    {

        int fact=1;int i;

        System.out.println("enter a number");

        Scanner reader = new Scanner(System.in);

        int num = reader.nextInt();

        

        for (  i = 1 ; i <= num ; i++)

        {

            fact= fact*i;

        }

        System.out.println(fact);

    }

}