Dart Core Libraries: dart:async
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The dart:async library in Dart is like a helper for dealing with tasks that take time, or in other words, asynchronous tasks. Here's a simple breakdown:
Async Operations: Imagine you have a task in your program that doesn't finish right away, like fetching data from the internet. dart:async helps you handle such tasks without making your program wait and do nothing.
Futures: A Future is like a promise. It says, "I'll give you the result of this task when it's done." The dart:async library helps you create and work with these promises.
Event Loops: When your program has many things to do, it might need to switch between tasks. dart:async helps manage this switching, so your program can keep doing useful work while waiting for something to finish.
Streams: Streams are like continuous flows of data. If your program needs to react to a series of events, like user input or data arriving from a server, dart:async provides tools to handle these streams of data
