IntToWord.scala

import scala.io.StdIn;

object IntToWord{
    def main(args:Array[String]){

        print("Input value\t: ");
        var in:Int = StdIn.readInt();

        int_word(in,true);

    }

    def int_word(x:Int, zero:Boolean = false):Unit = {
        if (x<0 || x>100000){
            println("Invalid value. Please enter value between 0 - 100000");

        }
        else if (x >= 1000){
            int_word(x/1000);
            print(" thousand");
            int_word(x%1000);
        }
        else if (x >= 100){
            int_word(x/100);
            print(" hundred");
            int_word(x%100);
        }
        else if(x >= 20){
            print(" ");
            if (x >= 90){
                print("ninety");
            }else if(x >= 80){
                print("eighty");
            }else if(x >= 70){
                print("seventy");
            }else if(x >= 60){
                print("sixty");
            }else if(x >= 50){
                print("fifty");
            }else if(x >= 40){
                print("fourty");
            }else if(x >= 30){
                print("thirty");
            }else if(x >= 20){
                print("twenty");
            }
            int_word(x%10);
        }
        else if(x >= 10){
            print(" ");
            x match {
                case 10 => print("ten");
                case 11=> print("eleven");
                case 12=> print("twelve");
                case 13=> print("thirteen");
                case 14=> print("fourteen");
                case 15=> print("fifteen");
                case 16=> print("sixteen");
                case 17=> print("seventeen");
                case 18=> print("eighteen");
                case 19=> print("nineteen");
            }

        }
        else{
            print(" ")
            x match {
                case 1 => print("one");
                case 2 => print("two");
                case 3 => print("three");
                case 4 => print("four");
                case 5 => print("five");
                case 6 => print("six");
                case 7 => print("seven");
                case 8 => print("eight");
                case 9 => print("nine");
                case 0 => {
                    if(zero){
                        print("zero");
                    }
                };
            }
        }
    }
}