What is the function of the swap function in C++?

The swap function in C++ is used to exchange the values of two variables. It accepts two parameters passed by value and can swap data of various types, including primitive data types and custom types. By swapping the values of two variables, the swap function allows for a mutual exchange of values between the variables. This is very useful in many scenarios, such as swapping the positions of array elements in sorting algorithms, or in any other situation that requires exchanging the values of two variables.