# Static vs Dynamic Typing

In C#, a variable's type is fixed when it's declared. In JavaScript, variables have no type; values do, and a variable can hold any of them. Declare with const by default, let when the value changes, and never var.

![Cheat sheet: Static vs Dynamic Typing](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/eba90e598aee4ff9a1d0cbca8521d938.webp)

- Category: JavaScript
- Level: Novice
- Tags: const (javascript), Dynamic Typing, JavaScript, let (javascript), Object Literal, Static Typing, Template Literal, typeof Operator
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/csharp-vs-javascript-static-vs-dynamic-typing-cheat-sheet