Example with futures

future.dart

void main() async {
  test().then((value) {
     print(value);
  });
  
  print(2);
  
  await Future.delayed(Duration(seconds:2), () {
    print(3);
  });
  
  print(4);
}

Future<int> test() async {
  await Future.delayed(Duration(seconds:2));
  return 1;
}

ntm