for...in loop
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What is for...in loop?
The for...in loop iterates over the enumerable properties of an object, including inherited ones. It is mainly used for iterating over object keys. It is not recommended for arrays because it iterates over all enumerable properties, not just numeric indexes, and does not guarantee order.
Free resources to learn for...in loop
- Articlefor...in statement - MDN
- ArticleThe for..in loop with examples
More in stage 7: Loops and Iterations
for...in loop: common questions
Can I learn for...in loop in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain for...in loop in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this for...in loop tutorial for beginners?
It is lesson 53 of 124 in the free JavaScript roadmap, in stage 7, Loops and Iterations. If you are new to JavaScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.