Java Program for Triangular Matchstick Number

class Main
{
    public static void main(String [] args)
    {
        //value of 'x' declared
        int x = 1;
        //finding number of matchstick required to form a triangular pyramid
        //Using the formula (3*x*(x+1))/2
        int no  = (3*x*(x+1))/2;
        System.out.println("The number of matchstick required to form a triangular pyramid is: " + no);
    }
}

Output:

The number of matchstick required to form a triangular pyramid is: 3