C++ Program to Calculate Sum of Digits.

What does sum of a digit mean?

Definition: The sum of the digits of a number is called its digit sum. For example, the digit sum of 17 is 8 because 1 + 7 = 8.

 

C++ Program to Calculate Sum of Digits.

#include <iostream>

using namespace std;

int main() {

    

    int n,r,sum=0;

    cout<<"Enter Number : ";

    cin>>n;

    while(n!=0)

    {

        r=n%10;

        sum=sum+r;

        n=n/10;

    }

    cout<<"Sum is : "<<sum;

    return 0;

}

Output :