Tell me what you know about the Event Loop, what it is and what it is used for?

Event Loop — is a mechanism that allows JavaScript (and other single-threaded environments) to handle asynchronous operations without blocking the main thread.

How it works:

• Calls to asynchronous functions (e.g., setTimeout, network requests) are placed in the event queue.
• The Event Loop constantly checks this queue and, when the main call stack is empty, takes the next event from the queue and executes it.

This enables efficient processing of many input/output operations without creating new threads.

Example: when you make a fetch request, JavaScript does not wait for the response but continues executing the next code. When the response arrives, the callback is placed in the event queue, and the Event Loop runs it when the main thread is free.