{"id":61401,"date":"2019-07-02T11:24:51","date_gmt":"2019-07-02T05:54:51","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=61401"},"modified":"2021-07-22T23:10:05","modified_gmt":"2021-07-22T17:40:05","slug":"cpp-vector","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/cpp-vector\/","title":{"rendered":"C++ Vector | Learn 5 Types of Functions Associated with Vector"},"content":{"rendered":"

A vector in C++ is one of the most basic concepts of its\u00a0Standard Template Library<\/em>. Programming in C++ is incomplete without possessing the knowledge of vectors. C++\u00a0Vectors are nothing but arrays that are dynamic in nature which means that vectors possess the ability to change their size anytime during program run<\/em>.<\/p>\n

Before we begin, it is important to have a basic idea of Arrays in C\/C++<\/a>.<\/strong><\/em><\/p>\n

\"C++<\/a><\/p>\n

C++ Vector<\/h2>\n

Vectors are basically a data structure that not only acts as a dynamic array but also ensures quick and random access of elements pertaining to that vector.<\/em><\/p>\n

We can easily insert, delete, traverse, and modify elements as well as manage computer memory required to store these with the help of the C++ sequence container.<\/p>\n

Just like arrays, vectors are stored in contiguous memory locations for easy traversal with the help of iteration.<\/p>\n

Note:<\/strong> It is important to note that Vector in C++ is totally different from Vectors in mathematics.<\/p>\n

Key takeaway:<\/strong> We need to include the header file #include<vector><\/strong> in order to access the Standard Template Library functions associated with vectors.<\/p>\n

\"Vectors<\/a><\/p>\n

Let us first discuss the basic syntax and the components of vectors before moving on to a C++ program.<\/strong><\/em><\/p>\n

Definition<\/h3>\n

Here is a definition of std::vector<\/strong><\/p>\n

template < class T, class Alloc = allocator<T> > class vector;<\/strong><\/p>\n

Now, let us discuss each component:<\/p>\n