What is pair in C++?

In C++, a pair is a simple template class that allows you to store two values of potentially different data types together as a single entity.

A pair in C++ is described as a container that combines two elements of the same or different data types in C++. Pair in C++ consists of two elements, first and second (must be in this order), and they are accessed using the dot (.) operator and the keyword first or second.