# let

A keyword that declares a block-scoped variable that can be reassigned.

## What is **let** in JavaScript?

**let** — A keyword that declares a block-scoped variable that can be reassigned.

```javascript
let score = 10;
score = score + 5;
```

Level: Novice · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/novice)

Updated: September 28, 2026

Source: https://www.ask-codey.com/glossary/let