Event-Driven Programming is a programming paradigm where the flow of the program is determined by events such as user actions, sensor outputs, or messages from other programs or sources. In event-driven systems, the program responds to these events by triggering actions or executing code snippets known as event handlers. These event handlers are registered to respond to specific events, and when an event occurs, the associated event handler is invoked.
Event-driven programming allows developers to build highly interactive and responsive applications as they can handle a wide variety of events in real time. It is particularly useful in graphical user interface (GUI) applications, games, and systems that rely on asynchronous input/output operations.
Key concepts in event-driven programming include event loops, event queues, and event dispatchers. The event loop continuously checks for events and dispatches them to the appropriate event handlers. Event queues are used to manage and prioritize events, ensuring they are processed in the order they were received. Event dispatchers play a crucial role in routing events to the correct event handlers based on their registered listeners or subscribers.