# Inheritance

Let's create a simple Person class with three properties:

• name
• gender
• age

And a method called greet to print a greeting.

class Person {
  constructor (name, gender, age){
    this.name = name;
    this.gender = gender;
    this.age = age;
  }

  greet () {
    console.log(`Hi, I am ${this.name}!`)
  }
}

If you come from a language like C#, you might ask: where are the properties defined?

Well, because JavaScript is a dynamic language, we can just use this. and come up with a property name.

Now, we can define a subclass called Teacher which inherits from Person:

class Teacher extends Person {
  constructor (name, gender, age) {
    super (name, gender, age);
  }
}

I can create two instances of these types:

var daniel = new Teacher('Daniel', 'male', 21);
var erik = new Person('Erik', 'male', 19);
daniel.greet();
erik.greet();