What is the purpose of the algorithm that outputs "Goodbye" when the user types -1?

The purpose of the algorithm that outputs "Goodbye" when the user types -1 is to handle user session termination. This mechanism serves as a clear signal to the user that they have chosen to end their interaction with the program. By using -1 as a specific input to trigger this response, the algorithm provides a straightforward and organized way to manage user sessions, ensuring that users can exit the program gracefully and with confirmation. This functionality is crucial in creating a user-friendly interface that allows users to understand when they have completed their tasks and are ready to stop using the application. Other options, while they may relate to different aspects of program behavior, do not capture the intention behind signaling the end of a session.