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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4.  
  5. /* Name of the class has to be "Main" only if the class is public. */
  6. class Ideone
  7. {
  8. 		static int digitSum(int input1){
  9. 			int newinput,sum=0;
  10. 			newinput = input1;//just to hold the copy of number so that we can later check if number is negative or not
  11. 			if(input1<0){
  12. 				input1 = -1*input1;
  13. 			}
  14. 			while(input1>0 || sum>9){
  15. 				if(input1==0)
  16. 				{
  17. 					input1=sum;
  18. 					sum=0;
  19. 				}
  20. 				sum += input1%10;
  21. 				input1 = input1/10;
  22. 			}
  23. 			if(newinput > 0){
  24. 			return sum;
  25. 			}
  26. 			else{
  27. 			return -1 * sum;
  28. 			}
  29. 		}
  30. 	public static void main (String[] args) throws java.lang.Exception
  31. 	{
  32. 		// your code goes here
  33. 		int input;
  34. 		Scanner sc = new Scanner(System.in);
  35. 		input = sc.nextInt();
  36. 		System.out.println(digitSum(input));
  37. 	}
  38. }
Success #stdin #stdout 0.13s 49436KB
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-976592
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https://ideone.com/6XAXez
language:
Java (HotSpot 12)
created:
2 years ago
visibility:
public

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