﻿ C++ Exercises: Compute the sum of the digits of an integer - w3resource

# C++ Exercises: Compute the sum of the digits of an integer

## C++ For Loop: Exercise-83 with Solution

Write a C++ program to compute the sum of the digits of an integer.

Visual Presentation:

Sample Solution:-

C++ Code :

``````#include <iostream> // Including the input-output stream library
using namespace std; // Using standard namespace

int main() // Main function
{
int num1, sum, n; // Declaring three integer variables: num1, sum, n
sum = 0; // Initializing the variable 'sum' to zero

// Displaying a message to compute the sum of the digits of an integer
cout << "\n\n Compute the sum of the digits of an integer:\n";
cout << "-------------------------------------------------\n";

// Asking the user to input any number
cout << " Input any number: ";
cin >> num1; // Taking user input for 'num1'
n = num1; // Assigning the value of 'num1' to 'n' to preserve the original number

// Loop to compute the sum of the digits of the input number
while (num1 != 0)
{
sum += num1 % 10; // Adding the last digit of 'num1' to 'sum'
num1 /= 10; // Removing the last digit from 'num1'
}

// Displaying the sum of the digits of the original number
cout << " The sum of the digits of the number " << n << " is: " << sum << endl;
}
``````

Sample Output:

``` Compute the sum of the digits of an integer:
-------------------------------------------------
Input any number: 25
The sum of the digits of the number 25 is: 7
```

Flowchart:

C++ Code Editor: