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# Chapter 5.   Stacks and Queues

![Stacks and Queues](../assets/covers/chapter_stack_and_queue.jpg){ class="cover-image" }

!!! abstract

    A stack is like cats piled on top of one another, while a queue is like cats lining up.

    They represent the logical relationships of LIFO (Last In, First Out) and FIFO (First In, First Out), respectively.

## Chapter contents

- [5.1   Stack](stack.md)
- [5.2   Queue](queue.md)
- [5.3   Deque](deque.md)
- [5.4   Summary](summary.md)