using System;

public class Program

{

    public static void Main()

    {

        string[] units = new string[] { "ONE ", "TWO ", "THREE ", "FOUR ", "FIVE ", "SIX ", "SEVEN ", "EIGHT ", "NINE ", "TEN ", "ELEVEN ", "TWELEVE ", "THIRTEEN ", "FOURTEEN ", "FIFTEEN ", "SIXTEEN ", "SEVENTEEN ", "EIGHTEEN ", "NINTEEN " };

            string[] tens=new string[]{"TEN ","TWENTY ","THIRTY ","FOURTY ","FIFTY ","SIXTY ","SEVENTY ","EIGHTY ","NINTY "};

            int i,num;

            string result="";

            Console.Write("Enter number here in range 1-999 : ");

            num = int.Parse(Console.ReadLine());

            if (num >99&&num<1000)

            {

                i=num/100;

                result=units[i-1]+"HUNDRED ";

                num =num%100;

            }//if

            if (num>19&&num<100)

            {

                i=num/10;

                result =result+tens[i-1];

                num=num%10;

            }//if

            if (num<20&&num>0)

                result+=units[num-1];

            Console.WriteLine("The number you entered: "+result);

            Console.ReadLine();

​

    }

}