What happens if a user clicks a button in an event-driven program?

In an event-driven program, user interactions such as clicking a button trigger specific actions defined in the code. When a user clicks a button, the corresponding event handler or code block associated with that button is executed. This design allows for a more interactive and responsive user experience because the program does not execute all lines of code sequentially. Instead, it waits for events (like button clicks) and responds to them, executing only the code that is relevant to the action taken by the user.

This mechanism enables developers to create dynamic applications where the user can control interactions, and the program reacts accordingly based on the user's input. For example, clicking a "Submit" button might execute code that processes a form or updates data, without affecting other parts of the program that are not relevant to that action.