using System;

​

public class Math{

    public void MultiplyTable(int n){

        //Loop to print the table

        for(int i = 1; i<=10; i++)

        {

            Console.WriteLine("{0} x {1} = {2}",n,i,n*i);

        }

    }

    public void DrawRectangle(int length, int width){

        for(int i=0; i<length; i++)

        {

            for(int j=0;j<width; j++)

                Console.Write("X");

            Console.WriteLine("");

        }

    }

    public void drawPyramid(int height){

        for(int i =0; i<height; i++){

            for(int j = height-1; j>i;j--)

                Console.Write(" ");

            for(int k = 0; k<2*i+1; k++)

                Console.Write("*");

            Console.WriteLine("");

        }

    }

}

​

​

public class Test

{

    public static void Main()

    {

        //Console.WriteLine("What multiply table do you want? ");

        //int a = Int32.Parse(Console.ReadLine());

        Math b = new Math();

        //b.MultiplyTable(a);

        //b.DrawRectangle(5,20);

        b.drawPyramid(4);

    }

}