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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.

Are vectors ordered in C++?

No vectors are not ordered in C++. Vector elements are placed in adjacent storage so that they can be accessed and travel across using iterators. In vectors, data is inserted at the end of it. Inserting an element at the end takes differential time, as sometimes there may be a need of extending the vector.

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