C++ Exercises: Find the sum of digits of a given number

C++ For Loop: Exercise-10 with Solution

Write a program in C++ to find the sum of digits of a given number.

Pictorial Presentation:

Sample Solution :-

C++ Code :

#include <iostream>
using namespace std;
int main()
{
    int num1, num2, r, sum=0;
    cout << "\n\n Find the sum of digits of a given number:\n";
    cout << "----------------------------------------------\n";
    cout << " Input a number: ";
    cin >> num1;
    num2 = num1;
    while (num1 > 0) 
    {
        r = num1 % 10;
        num1 = num1 / 10;
        sum = sum + r;
    }
    cout << " The sum of digits of " << num2 << " is: " << sum << endl;
}

Sample Output:

 Find the sum of digits of a given number:                             
----------------------------------------------                         
 Input a number: 1234                                                  
 The sum of digits of 1234 is: 10  

Flowchart:

C++ Code Editor:

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