Number0...100Text

import java.util.Scanner;

public class NumberFrom0To100Text {
    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int number = Integer.parseInt(input.nextLine());

        String[] firstTen = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight",  "nine", "ten"};
        String[] teens = {"eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
        String[] everyTenth = {"twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};

        int fPosition = number / 10 - 2;
        int sPosition = number % 10;

        if (number >= 0 && number <= 10){

            System.out.println(firstTen[number]);

        } else if (number > 10 && number <= 19) {

            System.out.println(teens[number - 11]);

        } else if (number % 10 == 0 && number != 100) {

            System.out.println(everyTenth[fPosition]);

        } else if (number > 20 && number <= 99) {

            System.out.printf("%s %s", everyTenth[fPosition], firstTen[sPosition]);

        } else if (number == 100) {

            System.out.println("one hundred");

        } else {

            System.out.println("invalid number");
        }
    }
}