When accessing array elements, using i refers to the index of the element while .at(i) is a method that retrieves the element at the specified index.
In terms of efficiency, using i is more efficient because it is a direct index lookup while .at(i) involves an additional method call.
No, both i and .at(i) serve the same purpose and can be used interchangeably to access array elements.
Yes, both i and .at(i) can be used to access elements in multidimensional arrays. However, .at(i) may be more convenient to use as it allows for easier indexing in multidimensional arrays.
Yes, .at(i) is preferred in cases where the array size is dynamic or unknown, as it provides an additional layer of error checking and prevents accessing elements that are out of bounds. This can help avoid runtime errors.