Variablen und Konstanten
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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.
123456let score = 10; score = 15; // value can change console.log(score); const maxPlayers = 4; // maxPlayers = 5; // ❌ error
Best Practices
- Use
constby default; - Use
letonly when needed;
Naming Variables
Use clear and descriptive names:
let playerScore = 100;
let maxLevel = 10;
Avoid:
- Starting with numbers;
- Reserved words;
- Unclear names like
xordata.
Why This Matters
Variables are the foundation of everything in JavaScript. You'll use them to store user data, application state, and results.
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