what library to mention for swap function in c++

To use the swap function in C++, you need to include the <algorithm> library. This library provides various algorithms, including the swap function, which is used to swap the values of two variables.

Here are the steps to use the swap function in C++:

1. Include the <algorithm> library at the beginning of your program: cpp #include <algorithm>

2. Declare the variables that you want to swap: cpp int a = 5; int b = 10;

3. Use the swap function to swap the values of the variables: cpp std::swap(a, b);

After this step, the value of a will be 10, and the value of b will be 5.

That's it! You have successfully used the swap function in C++ to swap the values of two variables.

Let me know if you have any further questions.