I'm having trouble wrapping my head around this idea/concept.

I know how an iterator works for a single dimension vector. You have the reverse iterator and the forward iterator. I would assume that you can have iterators for multidimensional vectors as well. However if you wanted to print the contents of the multidimensional vector, would you have to have an iterator for each dimension or could you use a single iterator to navigate though the vector in a row-by-row fashion?