nullsafety1-solution

main.dart

// Copyright 2019 the Dart project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file.

// Try using `?`, `!`, and `late` to clean up the analysis
// errors in this code!
class MyClass {
  late int val; 
  
  // Sometimes I get an error: Non-nullable instance field 'val'
  // must be initialized - line 12
  MyClass() {
    val = 3;
  }
}

void main() {
  int? a = null;
  int? b = a;
  final myClass = MyClass();
  
  a = 1;
  b = 2;
  
  print('$a, $b, ${myClass.val}');
}