How do the async and await keywords let you write asynchronous code in Dart that reads and looks like simple, straightforward sequential code?

Marking a function with the async keyword allows you to use the await keyword within that function's body, which pauses that specific function's execution at that exact point until the awaited Future actually completes, then resumes execution with the Future's resulting value, and this lets you write asynchronous code that reads in a natural, straightforward top to bottom sequential style, rather than needing to nest multiple separate then callback functions together, which can otherwise quickly become difficult to read for anything beyond a very simple asynchronous operation.

Future<void> loadUserData() async {
  final user = await fetchUser();
  final orders = await fetchOrders(user.id);
  print('Loaded ${orders.length} orders');
}