write a program to get the Factorial of a number

import java.util.Scanner;

public class Fac{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        System.out.println("enter the num for which u want the factorial");
        int num = in.nextInt();
        for(int i=num-1; i>0; i-- ){
            num = num*i;
        }
        System.out.println(num);
    }
}