Back to JavaScript HubPractice JavaScriptInterview JavaScript

Nearby lessons

20 of 40
JS - While LoopJS -Do While LoopJS - For In LoopJS - For Of LoopJS - For Each Loop

🏷️ JavaScript for...in Loop

📌 What is JavaScript for...in Loop?

The for...in loop iterates over enumerable properties of an object.

Best for object property iteration.

📋 for...in Basics

AttributeDescription
Syntaxfor (key in object)
UsageObject property iteration
NoteNot recommended for arrays
Example02
⚡Code Cell
Loading Editor...
✏️ You can edit this code — click Run to refresh the preview.
Output

🧠 Test Your Knowledge

2 Questions
Progress: 0 / 2