How do I use async and await in Dart?

How do I use async and await in Dart?

In Dart, you can use async and await to handle asynchronous operations. You mark a function as async and use await to pause execution until a Future completes.

Can you give me an example of using async and await?

Sure! Here's a simple example:

Future<String> fetchData() async {
  await Future.delayed(Duration(seconds: 2));
  return 'Data fetched!';
}

void main() async {
  print('Fetching data...');
  String data = await fetchData();
  print(data);
}

What happens if I don't use await?

If you don't use await, the function will return a Future immediately, and the code following the async call will execute without waiting for the Future to complete.

Are there any best practices for using async and await?

Yes! Always handle exceptions using try-catch, avoid blocking the UI thread, and prefer using async functions for I/O operations.