Sum of Digits Example C++ Program in C++

About this program

This is an example program in c common example program. Read the concept first: C++ Variables and Data Types, then study the code and output below.

Sum of Digits Definition:

Here modulus operator is used to add the digits of the input integer.

Sum of Digits Example Program

/*## Sum of Digits is odd or even In C++*/
/*## Calculation C++ Programs, Datatype C++ Programs, Basic C++ Programs*/

#include <iostream>
#include<conio.h>
#include<stdlib.h>

using namespace std;

int main() {
   // Declare Variables
   int inputNumber, temp, total = 0, remainder;

   cout << "Simple C++ Program : Sum of Digits\n";
   cout << "\nEnter a number whose sum is to be found : ";
   cin>>inputNumber;

   temp = inputNumber;

   while (temp != 0) {
      remainder = temp % 10;
      total = total + remainder;
      temp = temp / 10;
   }

   cout << "\nSum of digits of the number : " << inputNumber << " = " << total;

   getch();
   return (0);
}

Sample Output:

Simple C++ Program : Sum of Digits

Enter a number whose sum is to be found : 3421

Sum of digits of the number : 3421 = 10

How It Works

This C++ program demonstrates Sum of Digits Example. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C++ Programs — Browse all C++ Programs.
• C++ Variables and Data Types — Tutorial — data types and variable declaration.
• Factorial Using Loop Example Program In C++ — More in c common example program.
• Factorial Using Function Example Program In C++ — More in c common example program.