Async example in dart

async_in_dart.dart

import 'dart:async';

Future doSomething() {
  print('before future');
  var future = new Future(() {
    print('before done');
    for (var i = 0; i < 1000; i++) {
      // do something
    }
    print('done');
  });
  print('after future');
  return future;
}

Future<void> print1() async {
  print('before 1');
  var future = await doSomething();
  print(1);

//   future.then((v) {
//     print('future then');
//   });

  return future;
}

Future<void> print2() async {
  print('before 2');
  var future = await doSomething();
  print(2);

//   future.then((v) {
//     print('future then');
//   });

  return future;
}

void print3() {
  print(3);
}

void main() {
  print1();
  print2();
  print3();
}