using System;

​

public class Program

{

    // Requirements: 

    //  1. Write a loop to render as per output

    public static void Main()

    {

        int input = 5;

        // ######################## Part 1 ###########################  

        //output:

        //*

        //**

        //***

        //****

        //*****

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

        {

            Console.WriteLine(new String('*', i));

        }

​

        // ######################## Part 2 ###########################  

        //output:

        //*****

        //####

        //***

        //##

        //*

        Console.WriteLine(new String('=', 50));

        for (int i = input; i >= 1; i--)

        {

            if (i % 2 == 0)

            {

                Console.WriteLine(new String('#', i));

            }

            else

            {

                Console.WriteLine(new String('*', i));

            }

        }

​

        // ######################## Part 3 ###########################  

        //output:

        //1

        //23

        //345

        //4567

        //56789

        Console.WriteLine(new String('=', 50));

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

        {

            for (int a = i; a < i + i; a++)

            {

                Console.Write(a);

            }

            Console.WriteLine();

        }

    }

}