Sum Of Digits

Question

HI all,
i am writing a java code for sum of numbers upto a single digit
the code is perfectly well, its running fine.
but i want to perform this kind of task in another style with some conditions ..
1. No looping should be there.
2. No conditional expression.
3.Variable must be a single.
4. i want to use only +,- ,% operators.
can anyone show me the way how to do it.
My code goes something like this.....
import javax.swing.*;
class Digit{
     public static void main(String s[]){
          int num=Integer.parseInt(JOptionPane.showInputDialog("Enter A Number"));
          int sum=0;
          while (true){
               while(num>0){
                    int m=num%10;
                    sum+=m;
                    num=num/10;
               if(sum>9){
                    num=sum;
                    sum=0;
               else
                    break;
          System.out.println("Sum Is="+sum);
}thnx in advance

Answer 1

plz help me out of this problem quickly .
n i want to maintain only a single variable to store number http://www.catb.org/~esr/faqs/smart-questions.html#writewell
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