main.dart

class OpinionOnDart {
  const OpinionOnDart({
    required this.love,
    this.hate,
  });

  final String love;
  final String? hate;

  void express() {
    // I love Dart's type safety, which ensures 'love' is never null.
    print('What I love: $love');

    // I use the if-null operator (??) to provide a default value
    // in case there's nothing to hate.
    print('What I hate: ${hate ?? 'Nothing at all! Dart is great.'}');
  }
}

void main() {
  // My opinion is constant and unchanging.
  const myOpinion = OpinionOnDart(
    love: 'Its expressive syntax, incredible performance on multiple platforms (from mobile to web), and a developer-friendly, pragmatic approach to building software.',
    // The 'hate' property is null, so there are no complaints.
  );

  myOpinion.express();
}