Question

Write a program to find the repeated sum of digits of a number until it becomes a single-digit number.

Answer 1

Answer:

you want the answer in Java or some another language

Answer 2

Answer:

Input Format:

The input contains an integer which denotes 'n'  

Output Format:

Print the single digit number  

Sample Input :

88  

Sample Output  

7  

Explanation:

Step 1: 8+8 = 16

Step 2: 1+6 = 7

sum of digits of a number until it becomes a single-digit number which is 7 here.  

Solution:

#include<iostream>  

using namespace std;  

int singleDigit(int n){  

 int r = 0, s = 0;  

 while(n > 9){  

    while(n > 0){  

       r = n % 10;  

        n = n / 10;  

        s += r;  

        }    

   n = s;  

   s = 0;  

 }  

 return n;  

}  

int main(){  

 int n;  

 cin>>n;  

 cout<<singleDigit(n);  

}