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Java Program to find Sum of Digits

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instanceof java

Posts: 576
Nickname: instanceof
Registered: Jan, 2015

instanceof java is a java related one.
Java Program to find Sum of Digits Posted: Dec 19, 2015 10:58 PM
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Original Post: Java Program to find Sum of Digits
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1. Java Program to find sum of digits without using recursion.

  1. package com.instaceofjava;
  2. import java.util.Scanner;
  3.  
  4. public class SumOfDigits {
  5.  
  6. public static void main(String[] args) {
  7.  
  8. int number;
  9. Scanner in = new Scanner(System.in);
  10.  
  11. System.out.println("Please Enter a number");
  12.  
  13. number=in.nextInt(); 
  14.  
  15. int sum=0 ;
  16.  
  17. while(number!=0){
  18.  
  19. sum=sum+(number%10);
  20. number=number/10;
  21. }
  22.  
  23. System.out.println("Sum of Digits ="+sum);
  24.  
  25. }
  26. }
Output:

  1. Please Enter a number
  2. 123
  3. Sum of Digits=6


2. Java Program to find sum of digits using recursion.

  1. package com.instaceofjava;
  2. import java.util.Scanner;
  3.  
  4. public class SumOfDigits {
  5.  
  6. int sum;

  8. public int CalRecSum(int n){
  9.  
  10. if(n==0){
  11. return sum;
  12. }
  13. else{
  14.  
  15.  sum+=n%10;
  16.  CalRecSum(n/10);
  17.  
  18. } 
  19.  
  20. return sum;
  21. }

  23. public static void main(String[] args) {
  24.  
  25. int number;
  26. Scanner in = new Scanner(System.in);
  27.  
  28. System.out.println("Please Enter a number");
  29.  
  30. number=in.nextInt(); 
  31.  
  32. SumOfDigits   ob= new SumOfDigits();
  33. System.out.println("Sum of Digits ="+ob.CalRecSum(number));
  34.  
  35. }
  36.  
  37. }
Output:

  1. Please Enter a number
  2. 326
  3. Sum of Digits=11

Read: Java Program to find Sum of Digits

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