Simple Array Sum Program in C++

Simple array sum program in c++.

In this article, you will learn how to make a simple array sum program in c++.

Example

You should have knowledge of the following topics in c++ programming to understand these programs:

• C++ main() function
• C++ while loop
• C++ for loop

Source Code

// Simple Array Sum Program in C++
#include <iostream>
using namespace std;

int main() {
    int s;
    cout << "Enter size of the array:\n";
    cin >> s;
    
    int arr[s], i=0, sum=0;
    cout << "\nEnter the elements of the array:\n";
    while (i<s) {
        cin >> arr[i];
        sum += arr[i];
        i++;
    }
    cout << "\nSum = " << sum;
    return 0;
}

Run

Output

Explanation

In this given program, we have taken the size of the array 6 from the console input and then entered the 6 elements one by one 1, 3, 5, 7, 8, 9, 23, 56. Then we make iteration over on these elements and every element is added with the sum variable.

Then sum variable return the 112 output of the final program.

Simple Array Sum Program in C++ using For loop

// Simple Array Sum Program in C++ using For loop
#include <iostream>
using namespace std;

int main() {
    int s;
    cout << "Enter size of the array:\n";
    cin >> s;
    
    int arr[s], sum=0;
    cout << "\nEnter the elements of the array:\n";
    for (int i=0; i<s; i++) {
        cin >> arr[i];
        sum += arr[i];
    }
    cout << "\nSum = " << sum;
    return 0;
}

Run