Starting Code for Futures/Async/Await Demo

scratch.dart

import 'dart:io';

void main() {
  performTasks();
}

void performTasks()  {
   task1();
   task2();
   task3();
}

void task1() {
  String result = 'task 1 data';
  print('Task 1 complete');
}

void task2()  {
 String result = 'task 2 data';
  print('Task 2 complete');
}

void task3() {
 String result = 'task 3 data';
  print('Task 3 complete');
}

not working because of null safety

just need to add : late on

Future task2() async {
Duration threeSeconds = Duration(seconds: 3);
late String result;

await Future.delayed(threeSeconds, () {
result = 'task 2 data';
print('Task 2 complete');
});
return result;
}

result =
Task 1 complete
Task 2 complete
Task 3 complete with task 2 data

Process finished with exit code 0