# Geeksforgeeks Solution For " Repeated sum of digits "

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Problem :- Given an integer N, recursively sum digits of N until we get a single digit.  The process can be described below

Solution :-

#include <bits/stdc++.h>
using namespace std;
int fun1(int n1);
int main()
{
int t;
cin>>t;
while(t--)
{
int n,n1,n2,res=0;
cin>>n;
if(n<10)
cout<<n<<endl;
else
{
n1=fun1(n);
n2=fun1(n1);
cout<<n2<<endl;
}
}
return 0;
}
int fun1(int n1)
{
int i,j,sum=0,tmp=0;
while(n1!=0)
{
tmp=n1%10;
sum+=tmp;
n1=n1/10;
}
return sum;
}

Output:-

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#### post written by: Ghanendra Yadav

Hi, I’m Ghanendra Yadav, SEO Expert, Professional Blogger, Programmer, and UI Developer. Get a Solution of More Than 500+ Programming Problems, and Practice All Programs in C, C++, and Java Languages. Get a Competitive Website Solution also Ie. Hackerrank Solutions and Geeksforgeeks Solutions. If You Are Interested to Learn a C Programming Language and You Don't Have Experience in Any Programming, You Should Start with a C Programming Language, Read: List of Format Specifiers in C.