Returns the object located at the specified index.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
An index within the bounds of the array.
The object located at
index is beyond the end of the array (that is, if
index is greater than or equal to the value returned by
range is raised.