My First Dart code

main.dart

class Bicycle {
  int cadence;
  int _speed = 0;
  
 	//we have made speed as read only so we will just use get below to read its value.
  //we will update its value using _speed variable.(work as setter)
  // and to print the speed value (use _speed which always gets the latest speed value)
  int get speed => _speed;
  int gear;

  Bicycle(this.cadence, this.gear);

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

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

  @override
  String toString() => 'Bicycle: $_speed mph';
}

void main() {
  var bike = Bicycle(2, 1);
  print(bike);
  bike._speed=100;
  print(bike);
}