Example: Sum of Digits (Iterative) in C++

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// Sum of Digits (Iterative)
#include <iostream>
using namespace std;

int main() {
    int number;
    int sum = 0;

    // Step 1: Prompt the user to enter a number
    cout << "Enter a number: ";
    cin >> number;

    // Step 2: Store the original number for display
    int originalNumber = number;

    // Step 3: Loop while the number is greater than 0
    while (number > 0) {
        // Step 3a: Get the last digit of the number
        int digit = number % 10;
        
        // Step 3b: Add the digit to the sum
        sum += digit;
        
        // Step 3c: Remove the last digit from the number
        number /= 10; // Equivalent to number = number / 10;
    }

    // Step 4: Display the result
    cout << "The sum of digits of " << originalNumber << " is: " << sum << endl;

    return 0;
}