The provided C++ code snippet demonstrates basic operations on a doubly linked list using the Standard Template Library (STL). Here’s a breakdown of its key components:



1. **Include Necessary Headers**: The code includes the `<iostream>` header for input/output operations and the `<list>` header for using the `list` container.



2. **Main Function**: The program starts execution from the `main()` function.



3. **Creating a List**: A list named `numbers` is initialized with 5 ...