Java Program to Convert Number to Words

Learn how to convert number to words in Java with a simple example. This tutorial explains the logic, source code, and output for converting numbers from 1 to 99 into words.

Code Explanation (Step-by-Step)

  • First, create a Scanner class object to accept input from the user.
  • Use the sc.nextInt() method to read an integer value from the user and store it in the userNumber variable.
  • In the first if condition, check whether the entered number is less than 1 or greater than 99. If it is, print “wrong number”.
  • In the else if condition, check whether the number is between 1 and 19. If it is, print the corresponding word using the str2 array .
  • In the second else if condition, check whether the number is between 20 and 99.
  • Divide the number by 10 and store the result in the digit1 variable. This value represents the tens place of the number.
  • Use digit1 as an index for the str1 array to get the word for the tens place (such as twenty, thirty, forty, etc.).
  • Find the remainder by using the modulo (%) operator and store it in the digit2 variable. This value represents the ones place of the number.
  • Use digit2 as an index for the str2 array to get the word for the ones place.
  • Now, combine the values from both arrays and print the complete number in words.
				
					import java.util.Scanner;

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

        int userNumber, digit1, digit2;
        Scanner sc = new Scanner(System.in);

        String str1[] = {
                "", "", "twenty", "thirty", "forty",
                "fifty", "sixty", "seventy", "eighty", "ninety"
        };

        String str2[] = {
                "", "one", "two", "three", "four", "five",
                "six", "seven", "eight", "nine", "ten",
                "eleven", "twelve", "thirteen", "fourteen",
                "fifteen", "sixteen", "seventeen",
                "eighteen", "nineteen"
        };

        System.out.println("Enter the user number between 1 to 99");
        userNumber = sc.nextInt();

        if ((userNumber < 1) || (userNumber > 99)) {
            System.out.println("Wrong Number");
        } else if ((userNumber >= 1) && (userNumber <= 19)) {
            System.out.println("Number in words: " + str2[userNumber]);
        } else {
            digit1 = userNumber / 10;
            digit2 = userNumber % 10;

            System.out.println("Number in words: "
                    + str1[digit1] + " " + str2[digit2]);
        }

        sc.close();
    }
}

Output :-
Enter the user number between 1 to 99
56
print number to words :- fifty six

Validate the Number

				
					import java.util.Scanner;

public class NumberValidation {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        System.out.println("Enter a number between 1 and 99:");
        int userNumber = sc.nextInt();

        String result = (userNumber >= 1 && userNumber <= 99)
                ? "Valid Number"
                : "Wrong Number";

        System.out.println(result);

        sc.close();
    }
}

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