inheriting in Dart

Dart Inheritance

void main(){
 Car normal = Car();
 print(normal.numberOfSeat);
 normal.drive();
  
 ElectricCar myTesla = ElectricCar();
  myTesla.drive();
  myTesla.recharge();
  
}

class Car{
  int numberOfSeat = 5;
  void drive(){
    print('Wheels turn.');
  }
}

class ElectricCar extends Car{
  int batteryLevel = 100;
  void recharge(){
    batteryLevel = 100;
  }
}