using System;

​

class MainClass {

  public static void Main (string[] args) {

    Console.WriteLine("Цикл for");

​

  for (int i = 0; i < 3; i++) {

    Console.WriteLine(i);

​

    Console.WriteLine("Напишите свой любимый цвет на английском с маленькой буквы");

    var color = Console.ReadLine();

​

    switch (color) {

    case "red":

      Console.BackgroundColor = ConsoleColor.Red;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is red!");

      break;

​

    case "green":

      Console.BackgroundColor = ConsoleColor.Green;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is green!");

      break;

    case "cyan":

      Console.BackgroundColor = ConsoleColor.Cyan;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is cyan!");

      break;

    default:

      Console.BackgroundColor = ConsoleColor.Yellow;

      Console.ForegroundColor = ConsoleColor.Red;

​

      Console.WriteLine("Your color is yellow!");

      break;

    }

  }

​

  Console.WriteLine("Цикл while");

  int k = 0;

  while (k < 3) {

    Console.WriteLine(k);

​

    Console.WriteLine("Напишите свой любимый цвет на английском с маленькой буквы");

    var color = Console.ReadLine();

​

    switch (color) {

    case "red":

      Console.BackgroundColor = ConsoleColor.Red;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is red!");

      break;

​

    case "green":

      Console.BackgroundColor = ConsoleColor.Green;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is green!");

      break;

    case "cyan":

      Console.BackgroundColor = ConsoleColor.Cyan;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is cyan!");

      break;

    default:

      Console.BackgroundColor = ConsoleColor.Yellow;

      Console.ForegroundColor = ConsoleColor.Red;

​

      Console.WriteLine("Your color is yellow!");

      break;

    }

  }

​

  Console.WriteLine("Цикл do");

  int t = 0;

​

  do {

    Console.WriteLine(t);

​

    Console.WriteLine("Напишите свой любимый цвет на английском с маленькой буквы");

    var color = Console.ReadLine();

​

    switch (color) {

    case "red":

      Console.BackgroundColor = ConsoleColor.Red;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is red!");

      break;

​

    case "green":

      Console.BackgroundColor = ConsoleColor.Green;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is green!");

      break;

    case "cyan":

      Console.BackgroundColor = ConsoleColor.Cyan;

      Console.ForegroundColor = ConsoleColor.Black;

​

      Console.WriteLine("Your color is cyan!");

      break;

    default:

      Console.BackgroundColor = ConsoleColor.Yellow;

      Console.ForegroundColor = ConsoleColor.Red;

​

      Console.WriteLine("Your color is yellow!");

      break;

    }

​

  } while ( t < 3 );

​

​

  }

}