Use of iterators over array indices

Question

I just wanted to know what is the main advantage of using the iterators over the array indices. I have googled but i am not getting the right answer.

Answer 1

All of the standard containers provide the iterator concept. An iterator knows how to find the next element in the container, especially when the underlying structure isn't array-like. Array-style operator[] isn't provided by every container, so getting in the habit of using iterators will make more consistent-looking code, regardless of the container you choose.