What is a vector in CPP?

A vector in CPP is used to implement a dynamic array. Vector in real, is a sequence container class. Here, dynamic array means that the array size automatically resizes itself when appending elements at run time. However, in static array, array size cannot be changed during run time. To provide a reference to an element.

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:

Why should you use vectors in C++?

Unlike arrays, vectors can resize themselves automatically when you insert or delete elements, so they’re great to use when working with constantly changing data. Using vectors in your C++ program enables you to store your data with more flexibility and efficiency.

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.