Does using the array element access operator provide protection against out-of-bounds access?

In Swift, the array element access operator (for example, array[index]) does not provide bounds checking. If the index is out of bounds, the application will throw a runtime error and crash.

To access elements safely, you can use methods that return an optional value, such as an extension with an index check:

extension Array {
    func safeGet(index: Int) -> Element? {
        return indices.contains(index) ? self[index] : nil
    }
}

let arr = [1, 2, 3]
print(arr.safeGet(index: 5)) // nil, safe

Thus, the standard operator does not protect against out-of-bounds access, and the developer must manually check the bounds.