using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

namespace RepititionExamples
{
    class Program
    {
        static void Main(string[] args)
        {
            int choice = 0;
           

            while (choice != 4)
            {
                Console.Clear();
                Console.WriteLine("1: While Loop Example");
                Console.WriteLine("2: For Loop Example");
                Console.WriteLine("3: Do while Example");
                Console.WriteLine("4: Exit");
                Console.WriteLine("Enter your choice");
                choice = int.Parse(Console.ReadLine());

                switch(choice)
                {
                    case 1:
                WhileLoopExample();
                break;
                    case 2:
                ForLoopExample();
                break;
                    case 3:
                        DoWhileExample();
                        break;
                    case 4:
                        Console.WriteLine("Press any key to exit");
                        break;
                    default:
                        Console.WriteLine("Invalid Choice");
                        break;
            
            }
             Console.ReadKey();
            }
           
        }

        static void WhileLoopExample()
        {
            
            Console.WriteLine("Enter a Number");
            int number = int.Parse(Console.ReadLine());

            while (number < 41)
            {
                
                int prime = number * number - number + 41;
                Console.WriteLine(prime);
                number++;
            }
           
            
            


        }

        static void ForLoopExample()
        {
            int counter=0;
            Console.WriteLine("Enter how many loops");
            int num = int.Parse(Console.ReadLine());
            for (int i = 1; i <= num; i++)
            {
                int prime = i * i - i + 41;
                Console.WriteLine(prime);
                counter += i;
            }
            Console.WriteLine ("The total of the counter is {0}", counter);

        }

        static void DoWhileExample()
        {
            int number = 5;
            string displayNumber=null;

            do
            {
                number++;
                displayNumber += number.ToString() + "\n";
                
            } while (number < 10);
            MessageBox.Show(displayNumber.ToString(), "Loop Results");
        }
    }
}