What is the purpose of an event handler?

• A. To respond to user or system events
• B. To store data
• C. To render graphics
• D. To loop through items

Answer: (A)

An event handler is a piece of code that runs when something happens, such as a player clicking a button, pressing a key, or the system signaling a timer. Its purpose is to respond to those events by performing actions—updating the game state, starting an animation, or processing input—so the program reacts promptly to user and system activity. In game development this pattern lets the game stay interactive without constantly checking for every condition; the game registers handlers for events and the main loop dispatches control to them as events occur. Other tasks like storing data, drawing graphics, or looping through a list are handled by separate mechanisms such as data structures for storage, a renderer for visuals, and loops for iteration. So the event handler is the code that kicks into action exactly when something happens, enabling interactivity and responsiveness.