# Arrays and Lists

A review of the two ways each language keeps items in a row: a fixed-size array and a list that grows, reading and changing an item by its index, and when to use each.

![Cheat sheet: Arrays and Lists](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/f5cfe15a55674343b18f36f16caceda2.webp)

- Category: Data Structures
- Level: Novice
- Tags: Array (data-structures), c-sharp, Dynamic Array, java, JavaScript, python, typescript
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/ds-code-you-need-arrays-and-lists-cheat-sheet