It was the 4th week of the 100DaysofCode challenge and it turned out to be the most productive week in the entire challenge. I learned about REST API and defining RESTful routes. To practice defining RESTful routes, I made a project involving CRUD operations where the user could post a comment, edit the comment, view and delete comments. Though there were not any authentication and user account features, it was sufficient to get an idea about defining RESTful routes and passing data. In addition to this, I also solved 40 problems on arrays on geeksforgeeks and leetcode. Also focused on personal development and made it a habit to read at least 20 pages a day.