class Methods {
    //No Return W/o args
    public void add() {
        int a = 123;
        int b = 10;
        System.out.println("Addition : " + (a + b));
    }

    //No Return With Args
    public void sub(int x, int y) {
        System.out.println("Subtraction : " + (x - y));
    }
    //Return Without Args
    public int mul() {
        int a = 123;
        int b = 10;
        return a * b;
    }

    //Return With Args
    public float div(int x, int y) {
        return (x / y);
    }

    //Recursion Function
    public  int factorial(int n)//5!  =1*2*3*4*5=120
    {
        if(n==1)
            return 1;
        else
            return (n*factorial(n-1));
    }
    /*
factorial(5)
factorial(4)
factorial(3)
factorial(2)
factorial(1)

return 1;
return 2*1;
return 3*2;
return 4*6;
return 5*24;


* */

}


//Type of User Define Methods in Java
public class functions {
    public static void main(String args[]) {
        Methods o = new Methods();
        o.add();
        o.sub(123, 10);
        System.out.println("Muli : "+o.mul());
        System.out.println("Division : "+o.div(123,10));
    }
}