In C++, vectors are container that works like a dynamic array. STL provides iterators for the traversal of these containers. In this article, we will learn how to access an element in a vector using an iterator in C++.

Example

Input:
myVector = {1, 5, 8, 1, 3, 4}

Output:
myVector value at index 5 using iterator: 4

Access Element in a Vector Using Iterator in C++

Iterators work like a pointer to the elements. We first get the iterator to the beginning (or first element) of the vector using the std::vector::begin() function. Then we add the index of the element that we want to access and dereference it like a pointer using the dereferencing operator.

C++ Program To Access Vector Element Using Iterator in C++

Element at Index 4: 2

Time Complexity: O(1)
Space Complexity: O(1)