The result can be used as an lvalue. The index i must be between 0 and the length of the vector less one. If so, and if the index is out of range, then an exception of type RW BoundsErr will occur. The result cannot be used as an lvalue. The index i must be between 0 and the length of the vector less one.
Bounds checking is performed.
If the index is out of range, then an exception of type RW BoundsErr will occur. The result cannot be used as an lvalue. The index i must be between 0 and the length of the vector less one. If so, and if the index is out of range, then an exception of type RW BoundsErr will occur. Otherwise, returns TRUE .