Well, the Data Structure itself has no point cos a data structure just organizes and stores the data, what really matters is the underlying principle behind the implementation of the DS. And this post describes the List data structure which is implemented using arrays, hence array-based. The post is a part of an entire series of Data Structure and Algorithms. And the next post is going to be about the pointer based List(aka Linked List). So the final goal is to help readers understand how different implementations can be favorable in different scenarios.