#### Calculating the Sum of an Array of Integers

To calculate the sum of an array of integers, simply add all the integers in the array together. In the example given, the sum would be 1 + 2 + 3 + 4 + 5 , or 15.

#### Problem

```Given an array of integers, calculate the sum of all integers in the array.
Input: [1,2,3,4,5]
Output: 15```

#### Solution

This solution is in JavaScript. Our A.I. can create solutions in multiple languages.
by kayakane
```// Solution:

function sum(arr) {
let sum = 0;
for (let i = 0; i < arr.length; i++) {
sum += arr[i];
}
return sum;
}

// This solution is optimal because it uses a for loop to iterate through the array and add each element to the sum variable.
// This solution is O(n) because the time it takes to run is directly proportional to the size of the input.```

A.I. Evaluation of the Solution

This solution is correct and demonstrates a good understanding of how to solve the problem. The approach is straightforward and easy to follow.

Evaluated at: 2022-11-23 12:16:13