Summary  
This chapter explains how to declare and manage mutable (`let`) versus immutable (`const`) variables in JavaScript and outlines best practices for clear, descriptive naming.

General domain of usage  
Game development (e.g., tracking player scores and maximum players)

Variables let you store data that can change, while constants store values that should stay the same.
Use:
- `let`: when the value can change;
- `const`: when the value should not change.

let score = 10;
score = 15; // value can change
console.log(score);

const maxPlayers = 4;
// maxPlayers = 5; // ❌ error

### Best Practices
- Use `const` by default;
- Use `let` only when needed;


## Naming Variables
Use clear and descriptive names:
```js
let playerScore = 100;
let maxLevel = 10;
```
Avoid:
- Starting with numbers;
- Reserved words;
- Unclear names like `x` or `data`.


### Why This Matters
Variables are the foundation of everything in JavaScript.
You'll use them to store user data, application state, and results.

Leer hoe u programmalogica beheerst, gegevens structureert en dynamische functionaliteiten bouwt met JavaScript. Werk met functies, arrays, objecten en lussen, en pas deze vaardigheden toe om een interactief profielensysteem te creëren. Verkrijg de kernkennis die nodig is om door te stromen naar React en moderne frontend-ontwikkeling.

Pas uw kennis toe in een mini-project, leer de basisprincipes van debuggen en bereid u voor op de volgende stappen in JavaScript.

Variabelen en Constanten

Best Practices

Naming Variables

Why This Matters