What is a vector in C++?

In C++, vectors are used to store elements of similar data types. However, unlike arrays, the size of a vector can grow dynamically. That is, we can change the size of the vector during the execution of a program as per our requirements. Vectors are part of the C++ Standard Template Library.

What is std-vector in C++?

std::vector in C++ is the class template that contains the vector container and its member functions. It is defined inside the header file. The member functions of std::vector class provide various functionalities to vector containers. Some commonly used member functions are written below:

What is a vector header in C++?

In C++, the vector header file provides various functions that can be used to perform different operations on a vector. Vector iterators are used to point to the memory address of a vector element. In some ways, they act like pointers in C++.

What is a vector iterator?

An iterator that designates the first element remaining beyond any elements removed, or a pointer to the end of the vector if no such element exists. Returns a reference to the first element in a vector. A reference to the first element in the vector object. If the vector is empty, the return is undefined.