Learning Dart - 2 Create a simple Dart class

main.dart

class Bicycle {
  int _speed = 0;
  int get speed => _speed;
  int cadence;
  int wheel;

  Bicycle({this.cadence = 0, this.wheel = 0});

  @override
  String toString() =>
      'Bicycle: \n Speed is $speed km/h' +
      '\n Cadence is $cadence km/h' +
      '\n Wheel is $wheel km/h';

  void applyBrake(int decrement) {
    _speed -= decrement;
  }

  void speedUp(int increment) {
    _speed += increment;
  }
}

void main() {
  var bike = Bicycle(cadence: 50);
  bike.applyBrake(5);
  bike.speedUp(10);
  print(bike);
}