# Function Expressions and Arrow Functions

A function can be stored in a variable like any other value, arrow functions (=>) write small functions in a line, and default values fill in the arguments a caller leaves out.

![Cheat sheet: Function Expressions and Arrow Functions](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/10/77718c1bc7ed4aef9907c905bced7a7e.webp)

- Category: JavaScript
- Level: Apprentice
- Tags: Arrow Function, Default Parameter, Function Expression, JavaScript
- Updated: November 1, 2026

Source: https://www.ask-codey.com/cheat-sheets/javascript-functions-arrow-functions-cheat-sheet