C# Online Compiler | .NET Fiddle

<no name> by Anonymous

//Co, John Ropher S.
//CCP 1103 - ITBC
//Number to Words

using System;

public class NumbertoWords
{
	public static void Main()
	{
		string convertNumber;
		string word = "";
		int number;
		
		Console.WriteLine("Number to Words \n");
		Console.Write("Input a number to convert: ");
		convertNumber = Console.ReadLine();
		
		if (Int32.TryParse(convertNumber, out number) == true)
		{
			if (number < 0 || number > 1000)
			{
				Console.WriteLine("Invalid number. 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:
								word = "One hundred";
								break;
							case 2:
								word = "Two hundred";
								break;
							case 3:
								word = "Three hundred";
								break;
							case 4:
								word = "Four hundred";
								break;
							case 5:
								word = "Five hundred";
								break;
							case 6:
								word = "Six hundred";
								break;
							case 7:
								word = "Seven hundred";
								break;
							case 8:
								word = "Eight hundred";
								break;
							case 9:
								word = "Nine hundred";
								break;
						}
					}

					number = number % 100;
					if (number >= 21)
					{
						switch (number / 10)
						{
							case 2:
								word = word + " twenty";
								break;
							case 3:
								word = word + " thirty";
								break;
							case 4:
								word = word + " fourty";
								break;
							case 5:
								word = word + " fifty";
								break;
							case 6:
								word = word + " sixty";
								break;
							case 7:
								word = word + " seventy";
								break;
							case 8:
								word = word + " eighty";
								break;
							case 9:
								word = word + " ninety";
								break;
						}

						number = number % 10;
					}

					if (number >= 10)
					{
						switch (number - 10)
						{
							case 1:
								word = word + " eleven";
								break;
							case 2:
								word = word + " twelve";
								break;
							case 3:
								word = word + " thirteen";
								break;
							case 4:
								word = word + " fourteen";
								break;
							case 5:
								word = word + " fifteen";
								break;
							case 6:
								word = word + " sixteen";
								break;
							case 7:
								word = word + " seventeen";
								break;
							case 8:
								word = word + " eighteen";
								break;
							case 9:
								word = word + " nineteen";
								break;
						}

						number = number - number;
					}
				}

				switch (number)
				{
					case 1:
						word = word + " one";
						break;
					case 2:
						word = word + " two";
						break;
					case 3:
						word = word + " three";
						break;
					case 4:
						word = word + " four";
						break;
					case 5:
						word = word + " five";
						break;
					case 6:
						word = word + " six";
						break;
					case 7:
						word = word + " seven";
						break;
					case 8:
						word = word + " eight";
						break;
					case 9:
						word = word + " nine";
						break;
					case 10:
						word = word + "  ten";
						break;
				}

				Console.WriteLine(word);
			}
		}
		else
		{
			Console.WriteLine("Please input a positive integer.");
		}
	}
}

​x
 
//Co, John Ropher S.
//CCP 1103 - ITBC
//Number to Words
​
using System;
​
public class NumbertoWords
{
    public static void Main()
    {
        string convertNumber;
        string word = "";
        int number;
        
        Console.WriteLine("Number to Words \n");
        Console.Write("Input a number to convert: ");
        convertNumber = Console.ReadLine();
        
        if (Int32.TryParse(convertNumber, out number) == true)
        {
            if (number < 0 || number > 1000)
            {
                Console.WriteLine("Invalid number. 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:
                                word = "One hundred";
                                break;
                            case 2:
                                word = "Two hundred";
                                break;
                            case 3:
                                word = "Three hundred";
                                break;
                            case 4:
                                word = "Four hundred";
                                break;
                            case 5:
                                word = "Five hundred";
                                break;
                            case 6:
                                word = "Six hundred";
                                break;
                            case 7:
                                word = "Seven hundred";
                                break;
                            case 8:
                                word = "Eight hundred";
                                break;
                            case 9:
                                word = "Nine hundred";
                                break;
                        }
                    }
​
                    number = number % 100;
                    if (number >= 21)
                    {
                        switch (number / 10)
                        {
                            case 2:
                                word = word + " twenty";
                                break;
                            case 3:
                                word = word + " thirty";
                                break;
                            case 4:
                                word = word + " fourty";
                                break;
                            case 5:
                                word = word + " fifty";
                                break;
                            case 6:
                                word = word + " sixty";
                                break;
                            case 7:
                                word = word + " seventy";
                                break;
                            case 8:
                                word = word + " eighty";
                                break;
                            case 9:
                                word = word + " ninety";
                                break;
                        }
​
                        number = number % 10;
                    }
​
                    if (number >= 10)
                    {
                        switch (number - 10)
                        {
                            case 1:
                                word = word + " eleven";
                                break;
                            case 2:
                                word = word + " twelve";
                                break;
                            case 3:
                                word = word + " thirteen";
                                break;
                            case 4:
                                word = word + " fourteen";
                                break;
                            case 5:
                                word = word + " fifteen";
                                break;
                            case 6:
                                word = word + " sixteen";
                                break;
                            case 7:
                                word = word + " seventeen";
                                break;
                            case 8:
                                word = word + " eighteen";
                                break;
                            case 9:
                                word = word + " nineteen";
                                break;
                        }
​
                        number = number - number;
                    }
                }
​
                switch (number)
                {
                    case 1:
                        word = word + " one";
                        break;
                    case 2:
                        word = word + " two";
                        break;
                    case 3:
                        word = word + " three";
                        break;
                    case 4:
                        word = word + " four";
                        break;
                    case 5:
                        word = word + " five";
                        break;
                    case 6:
                        word = word + " six";
                        break;
                    case 7:
                        word = word + " seven";
                        break;
                    case 8:
                        word = word + " eight";
                        break;
                    case 9:
                        word = word + " nine";
                        break;
                    case 10:
                        word = word + "  ten";
                        break;
                }
​
                Console.WriteLine(word);
            }
        }
        else
        {
            Console.WriteLine("Please input a positive integer.");
        }
    }
}

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