# Arrow Functions

An arrow function is JavaScript's lambda, written (a, b) => a + b, almost exactly like C#. One parameter needs no parentheses, a body in braces needs a return, and an object returned on its own needs parentheses around it.

![Cheat sheet: Arrow Functions](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/91f7a9840cfc47eba2990c37c75bf503.webp)

- Category: JavaScript
- Level: Apprentice
- Tags: Arrow Function, Callback Function, JavaScript
- Updated: November 3, 2026

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