Can you explain how the EventLoop mechanism works in asynchronous applications?

EventLoop is a mechanism that manages the execution of asynchronous tasks in applications, allowing efficient processing of multiple operations without blocking the main thread.

In asynchronous applications (for example, in Flutter or Dart), the EventLoop works as follows:

1. All asynchronous tasks (futures, timers, input events, etc.) are placed in the event queue.
2. The EventLoop sequentially retrieves tasks from the queue and executes them.
3. If a task initiates a new asynchronous operation, it is added to the queue.
4. The EventLoop continues the cycle until the queue is empty.

This allows the application to remain responsive, not block the UI thread, and efficiently utilize resources.

Example in Dart:

void main() {
  print('Start');
  Future.delayed(Duration(seconds: 1), () => print('Async task done'));
  print('End');
}

The output will be:

Start
End
Async task done

Because the EventLoop first executes the synchronous code, then the asynchronous tasks from the queue.