Main.java

package RomanNumberExample;

import java.util.Scanner;
import java.util.concurrent.ConcurrentHashMap;

import static java.lang.System.in;
import static java.lang.System.out;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(in);
        out.println("Waiting for Input Request - ");
        int num = scan.nextInt();
        out.println("Received Input is -- " + num);

        String englishWords[] = {"Million", "Lakh", "Ten Thousand", "Thousand", "Hundred",
                "Ninety", "Eighty", "Seventy", "Sixty", "Fifty", "Forty", "Thirty", "Twenty",
                "Nineteen", "Eighteen", "Seventeen", "sixteen", "Fifteen", "Fourteen", "Thirteen", "Twelve", "Eleven",
                "Ten", "Nine", "Eight", "Seven", "Six", "Five", "Four", "Three", "Two", "One", ""
        };
        int numbers[] = {1000000, 100000, 10000, 1000, 100,
                90, 80, 70, 60, 50, 40, 30, 20, 19, 18, 17, 16, 15,
                14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};

        String result = "";
        for (int index = 0; index < numbers.length; index++) {
            while (num >= numbers[index]) {
                num = num - numbers[index];
                result = result.concat(" ").concat(englishWords[index]);
            }
        }

        System.out.println("Final Result is  -- " + result);

    }
    
}