Sum of Digits Until Single Digit in Java Language

Sum of Digits Until Single Digit in Java Language – we will find the sum of digits until the single digit in Java. Previously we have developed a Java program to find the sum of digits of the number. But now we will find the sum of digits until the number becomes single digit,

• Example:- number = 123456
• => The sum of digits of 123456 = 1+2+3+4+5+6 = 21
• => The number 21 is of two digits number so again we will find the sum of digits of the number,
• => The sum of digits of 21 = 2+1 = 3
• Now, 3 is single-digit so it is the digital sum of the number 123456.

Sum of Digits Until Single Digit in Java Language

import java.util.Scanner;

public class DigitalSum {

   // method to find sum of digits
   // of a given number
   public static int sumOfDigits(int number) {

      // declare variables
      int lastDigit = 0;
      int sum = 0;

      // loop to repeat the process
      while(number != 0) {
         // find last digit
         lastDigit = number % 10;
         // add last digit to sum
         sum = sum + lastDigit;
         // remove last digit
         number = number / 10;
      }

      // sum value is the sum of digits
      // of the given number
      return sum;
  }

  // method to find digital sum
  public static int digitalSum(int number) {
     int result = number;
     while(result / 10 != 0) {
	   result = sumOfDigits(result);
     }
     return result;
  }

  public static void main(String[] args) {

      // declare variables
      int number = 0;
      int sumOfDigitsUntilSingle = 0;

      // create Scanner class object 
      // for reading the values
      Scanner scan =  new Scanner(System.in);
      // read inputs
      System.out.print("Enter an integer number:: ");
      number = scan.nextInt();

      // find sum of digits of number
      sumOfDigitsUntilSingle = digitalSum(number);

      // display result
      System.out.println("The sum of digits until" +
         " single digit of the number "+number+
         " = "+sumOfDigitsUntilSingle);

      // close Scanner class object
      scan.close();
  }
}

OUTPUT

Enter an integer number:: 123456
The sum of digits until single digit of the number 123456 = 3

Enter an integer number:: 456
The sum of digits until single digit of the number 456 = 6

Types of Sorting Algorithms:

• Quick Sort
• Bubble Sort
• Merge Sort
• Insertion Sort
• Selection Sort
• Heap Sort
• Radix Sort
• Bucket Sort

Additional Reading

• SEO Practices Everyone Should Follow SEO Rules
• Complete Top SEO Checklist
• Yoast Seo Premium 15.2 Nulled – WordPress SEO Plugin
• Top 50+ SEO Interview Questions
• What is a Backlink? How to Get More Backlinks

READ MORE

If you found this post useful, don’t forget to share this with your friends, and if you have any query feel free to comment it in the comment section.

Thank you 😊 Keep Learning !