Example of polymorphism or method overriding
Polymorphism means having two functions with same name but with different arguments or different return type

class Animal {
  void eat() {
    print("Animal is eating");
  }
}

class Dog extends Animal {
  @override
  void eat() {
    print("Dog is eating");
  }
}

void main() {
  Animal animal = Animal();
  animal.eat();

  Dog dog = Dog();
  dog.eat();
}

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Another example of polymorphism

class Vehicle {
  void run() {
    print("Vehicle is running");
  }
}

class Bus extends Vehicle {
  @override
  void run() {
    print("Bus is running");
  }
}

void main() {
  Vehicle vehicle = Vehicle();
  vehicle.run();

  Bus bus = Bus();
  bus.run();
}

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Another example of polymorphism

class Car{
  void power(){
    print("It runs on petrol.");
  }
}

class Honda extends Car{
  
}
class Tesla extends Car{
  @override
  void power(){
    print("It runs on electricity.");
  }
}

void main(){
  Honda honda=Honda();
  Tesla tesla=Tesla();
  
  honda.power();
  tesla.power();
}

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Another example of polymorphism

class Employee{
  void salary(){
    print("Employee salary is \$1000.");
  }
}

class Manager extends Employee{
  @override
  void salary(){
    print("Manager salary is \$2000.");
  }
}

class Developer extends Employee{
  @override
  void salary(){
    print("Developer salary is \$3000.");
  }
}

void main(){
  Manager manager=Manager();
  Developer developer=Developer();
  
  manager.salary();
  developer.salary();
}

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