> For the complete documentation index, see [llms.txt](https://kkishan114.gitbook.io/10-days-of-javascript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kkishan114.gitbook.io/10-days-of-javascript/index/day-5-inheritance.md).

# Day 5: Inheritance

### Problem Link <a href="#problem" id="problem"></a>

* [x] [**HackerRank Problem Link**](https://www.hackerrank.com/challenges/js10-inheritance/problem)

### Solution

* [x] **JS Solution**

{% code title="inheritance.js" %}

```javascript
Rectangle.prototype.area = function() {
  return this.w * this.h;
};

class Square extends Rectangle {
  constructor(s) {
    super(s);
    this.h = s;
    this.w = s;
  }
}
```

{% endcode %}