//LACAP,CLYDE LAURENCE S.

//CCP1103-ITBC

//NUMBER TO WORD

using System;

​

public class Program

{

    public static void Main()

    {

        string convertNumber;

        string numberinWords = ""; 

        int number;

        Console.WriteLine("Number to Word");

        Console.Write("Enter a number: ");

        convertNumber = Console.ReadLine();

        if (Int32.TryParse(convertNumber, out number) == true)

        {

            if (number < 0 || number > 1000)

            {

                Console.WriteLine("Invalid input. Please input numbers from 1 to 1000 only.");

            }

            else

            {

                if (number == 1000)

                {

                    Console.WriteLine("one thousand");

                }

                else if (number == 0)

                {

                    Console.WriteLine("zero");

                }

                else

                {

                    if (number >= 100)

                    {

                        switch (number / 100)

                        {

                            case 1:

                                numberinWords = "one hundred";

                                break;

                            case 2:

                                numberinWords = "two hundred";

                                break;

                            case 3:

                                numberinWords = "three hundred";

                                break;

                            case 4:

                                numberinWords = "four hundred";

                                break;

                            case 5:

                                numberinWords = "five hundred";

                                break;

                            case 6:

                                numberinWords = "six hundred";

                                break;

                            case 7:

                                numberinWords = "seven hundred";

                                break;

                            case 8:

                                numberinWords = "eight hundred";

                                break;

                            case 9:

                                numberinWords = "nine hundred";

                                break;

                        }

                    }

                    number = number % 100;

                    if (number >= 20)

                    {

                        switch (number / 10)

                        {

                            case 2:

                                numberinWords = numberinWords + " twenty ";

                                break;

                            case 3:

                                numberinWords = numberinWords + " thirty ";

                                break;

                            case 4:

                                numberinWords = numberinWords + " fourty ";

                                break;

                            case 5:

                                numberinWords = numberinWords + " fifty ";

                                break;

                            case 6:

                                numberinWords = numberinWords + " sixty ";

                                break;

                            case 7:

                                numberinWords = numberinWords + " seventy ";

                                break;

                            case 8:

                                numberinWords = numberinWords + " eighty ";

                                break;

                            case 9:

                                numberinWords = numberinWords + " ninety ";

                                break;

                        }

                        number = number % 10;

                    }

​

                    if (number >= 10)

                    {

                        switch (number - 10)

                        {

                            case 0:

                                numberinWords = numberinWords + "  ten";

                                break;

                            case 1:

                                numberinWords = numberinWords + " eleven";

                                break;

                            case 2:

                                numberinWords = numberinWords + " twelve";

                                break;

                            case 3:

                                numberinWords = numberinWords + " thirteen";

                                break;

                            case 4:

                                numberinWords = numberinWords + " fourteen";

                                break;

                            case 5:

                                numberinWords = numberinWords + " fifteen";

                                break;

                            case 6:

                                numberinWords = numberinWords + " sixteen";

                                break;

                            case 7:

                                numberinWords = numberinWords + " seventeen";

                                break;

                            case 8:

                                numberinWords = numberinWords + " eighteen";

                                break;

                            case 9:

                                numberinWords = numberinWords + " nineteen";

                                break;

                        }

                        number = number - number;

                    }

                }

​

                switch (number)

                {

                    case 1:

                        numberinWords = numberinWords + "one";

                        break;

                    case 2:

                        numberinWords = numberinWords + "two";

                        break;

                    case 3:

                        numberinWords = numberinWords + "three";

                        break;

                    case 4:

                        numberinWords = numberinWords + "four";

                        break;

                    case 5:

                        numberinWords = numberinWords + "five";

                        break;

                    case 6:

                        numberinWords = numberinWords + "six";

                        break;

                    case 7:

                        numberinWords = numberinWords + "seven";

                        break;

                    case 8:

                        numberinWords = numberinWords + "eight";

                        break;

                    case 9:

                        numberinWords = numberinWords + "nine";

                        break;

                }

​

                Console.Write(numberinWords);

            }

        }

        else

        {

            Console.WriteLine("Input error. Please enter a valid number.");

        }

    }

}