What are C++ standard iterators?

Can you explain what C++ standard iterators are?

C++ standard iterators are objects that allow you to traverse elements in a container, like arrays or vectors.

What types of iterators are available in C++?

There are several types of iterators in C++, including input iterators, output iterators, forward iterators, bidirectional iterators, and random access iterators.

How do I use a vector iterator in my code?

You can use a vector iterator by calling the begin() and end() methods of the vector. For example:

std::vector<int> vec = {1, 2, 3};
for (auto it = vec.begin(); it != vec.end(); ++it) {
    std::cout << *it << ' ';
}

What is the difference between a forward iterator and a random access iterator?

A forward iterator can only move in one direction (forward), while a random access iterator can move both forward and backward and allows direct access to any element.