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# Chapter 4.   Arrays and Linked Lists

![Arrays and Linked Lists](../assets/covers/chapter_array_and_linkedlist.jpg){ class="cover-image" }

!!! abstract

    The world of data structures is like a solid brick wall.

    The bricks of an array are neatly arranged, each closely connected to the next. In contrast, the bricks of a linked list are scattered, with vines of connections freely weaving through the gaps between bricks.

## Chapter Contents

- [4.1   Array](https://www.hello-algo.com/chapter_array_and_linkedlist/array/)
- [4.2   Linked List](https://www.hello-algo.com/chapter_array_and_linkedlist/linked_list/)
- [4.3   List](https://www.hello-algo.com/chapter_array_and_linkedlist/list/)
- [4.4   Memory and Cache](https://www.hello-algo.com/chapter_array_and_linkedlist/ram_and_cache/)
- [4.5   Summary](https://www.hello-algo.com/chapter_array_and_linkedlist/summary/)