private static void Menu() { while (true) { string message = "\nHello user! Welcome to the functional application!" + "\n Enter an option below:" + "\n 0 - Ending Application" + "\n 1 - Read Files" + "\n 2 - Initialize multiplication table" + "\n 3 - Calculate averages"; Console.WriteLine(message); int entry = int.Parse(Console.ReadLine()); Console.WriteLine("========================================="); if (entry == READ_FILES) { ReadFiles.UseReadFiles(1); } else if (entry == MULTIPLICATION_TABLE) { MultiplicationTable.UseMultiplicationTable(5); } else if (entry == CALCULATE_AVERAGE) { CalculateAverage.UseCalculateAverage(5.4, 8.2); } else { Console.WriteLine("\nApplication ending successfully!"); break; } } }