"Sum all elements in an array"

Problem

Given an array of integers, find the sum of all elements in the array.
Input:
[1, 2, 3, 4]
Output:
10

Solution

This solution is in C++. Our A.I. can create solutions in multiple languages.

kayakane

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<int> arr = {1, 2, 3, 4};
    int sum = 0;
    for (int i = 0; i < arr.size(); i++) {
        sum += arr[i];
    }
    cout << sum << endl;
    return 0;
}

/*

The solution above is optimal because it is O(n) time complexity.

*/