Iterate through a C++ Vector using a 'for' loop

Question

I am new to the C++ language. I have been starting to use vectors, and have noticed that in all of the code I see to iterate though a vector via indices, the first parameter

Answer 1

With STL, programmers use iterators for traversing through containers, since iterator is an abstract concept, implemented in all standard containers. For example, std::list has no operator [] at all.