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 Object-Oriented JavaScript (2015) Introduction to Methods Understanding this

Posted by ruhullalam
ruhullalam
14,500 Points

Why is there undefined coming up too?

It prints the number but also undefined on the next line, what's happening there?

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

The Chrome console automatically displays what a function returns after you run it. Since the function does not actually return anything chrome shows the return value as undefined.

Returning values is not something that has been covered in this course yet but is a concept that will be explained quite soon. So this behavior will likely start to make more sense as you get farther into the course.