for...in loop in JavaScript

What this snippet does

for...in iterates the enumerable property keys of an object, not values directly.

Expected output

name: Alice
age: 30
city: NY

Why practise typing this

Typing loops code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

More JavaScript practice

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