Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects Review `for in` Loops, Arrays of Objects and JSON

Marshall Vaughn
Marshall Vaughn
4,016 Points

This quiz includes the for in loop: "for ( property in car )" Shouldn't it be "for ( var property in car )"?

I thought it was required to have var in front of your variable for a for in loop?

1 Answer

I would agree with you. Doing it without var makes property a global variable, which isn't necessary, and seems to violate the principle that says keep variable scope as small as possible.