Java Program to convert Digits/Numbers to Words

September 30, 2022

Digit/number to words in Java

Converting digit/number to words in Java

Here, in this page we will discuss the program for Digit/number to words in Java .The conversion of numbers in words is just a conversion of numeric values to the English format of reading numbers. This code supports the conversion of numbers from 0 – 9999 in English format. Digits have different places when read from its ones place to above.

Algorithm

  • Take the input from the user.
  • Use two conditional If statements to determine whether the digit is larger then 999 or not.
  • If yes, Divide the number into two parts at the thousands place.
  • Now In the display() function pass the three digit number as a argument where this function will print the number in its words format.

Code in Java

Run 
class Main {
  
    static void convert_to_words(char[] num)
    {
    
        int len = num.length;
 
        // Base cases
        if (len == 0) {
            System.out.println("empty string");
            return;
        }
        if (len > 4) {
            System.out.println(
                "Length more than 4 is not supported");
            return;
        }
 
        String[] single_digits = new String[] {
            "zero", "one", "two",   "three", "four",
            "five", "six", "seven", "eight", "nine"
        };
 
        String[] two_digits = new String[] {
            "",          "ten",      "eleven",  "twelve",
            "thirteen",  "fourteen", "fifteen", "sixteen",
            "seventeen", "eighteen", "nineteen"
        };
 
        String[] tens_multiple = new String[] {
            "",      "",      "twenty",  "thirty", "forty",
            "fifty", "sixty", "seventy", "eighty", "ninety"
        };
 
        String[] tens_power = new String[] { "hundred", "thousand" };
 
        System.out.print(String.valueOf(num) + ": ");

        if (len == 1) {
            System.out.println(single_digits[num[0] - '0']);
            return;
        }
 
        int x = 0;
        while (x < num.length) { if (len >= 3) {
                if (num[x] - '0' != 0) {
                    System.out.print(single_digits[num[x] - '0'] + " ");
                    System.out.print(tens_power[len - 3] + " ");
                    
                }
                --len;
            }
 
            else {
        
                if (num[x] - '0' == 1) {
                    int sum
                        = num[x] - '0' + num[x + 1] - '0';
                    System.out.println(two_digits[sum]);
                    return;
                }
 
                else if (num[x] - '0' == 2
                         && num[x + 1] - '0' == 0) {
                    System.out.println("twenty");
                    return;
                }
 
                else {
                    int i = (num[x] - '0');
                    if (i > 0)
                        System.out.print(tens_multiple[i] + " ");
                    else
                        System.out.print("");
                    ++x;
                    if (num[x] - '0' != 0)
                        System.out.println(single_digits[num[x] - '0']);
                }
            }
            ++x;
        }
    }
 
    // Driver Code
    public static void main(String[] args)
    {
        convert_to_words("1121".toCharArray());
    }
}

Output:

1121 : one thousand one hundred twenty one

Can a number be expressed as a sum of two prime numbers

Count possible decoding of a given digit sequence

Find the prime numbers between 1 to 100

Calculate the number of digits in an integer

Counting number of days in a given month of a year

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1 comments on “Java Program to convert Digits/Numbers to Words”


  • Chetan

    import java.util.Scanner;

    public class NumberToWords {

    private static final String[] units = {
    “”, “One”, “Two”, “Three”, “Four”, “Five”, “Six”, “Seven”, “Eight”, “Nine”
    };

    private static final String[] teens = {
    “”, “Eleven”, “Twelve”, “Thirteen”, “Fourteen”, “Fifteen”, “Sixteen”, “Seventeen”, “Eighteen”, “Nineteen”
    };

    private static final String[] tens = {
    “”, “Ten”, “Twenty”, “Thirty”, “Forty”, “Fifty”, “Sixty”, “Seventy”, “Eighty”, “Ninety”
    };

    public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    System.out.print(“Enter a number (up to 999): “);
    int number = scanner.nextInt();

    if (number 999) {
    System.out.println(“Please enter a number between 0 and 999.”);
    } else {
    System.out.println(“Number in words: ” + convertToWords(number));
    }

    scanner.close();
    }

    private static String convertToWords(int number) {
    if (number == 0) {
    return “Zero”;
    }

    String result = “”;

    // Extract digits
    int hundreds = number / 100;
    int remaining = number % 100;
    int tensDigit = remaining / 10;
    int onesDigit = remaining % 10;

    if (hundreds > 0) {
    result += units[hundreds] + ” Hundred”;
    }

    if (remaining > 0) {
    if (hundreds > 0) {
    result += ” and “;
    }

    if (remaining >= 11 && remaining 0) {
    result += ” ” + units[onesDigit];
    }
    }
    }

    return result;
    }
    }