1The extends keyword is used to create a child class of another class (parent). 2The child class inherits all the methods from another class. Inheritance is 3useful for code reusability: reuse properties and methods of an existing class 4when you create a new class.
1The extends keyword is used to create a child class of another class (parent). The child class inherits all the methods from another class. Inheritance is useful for code reusability: reuse properties and methods of an existing class when you create a new class.