Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Michal JanekFront End Web Development Techdegree Graduate 30,653 Points
Why create new variable - randNum ?
We can basically use document.write( randomNumber(upper)+" "); and the code would work. Is it just so we can actually store it into a new var for future possible purposes?
Steven Parker211,090 Points
You're right, the randNum variable is not needed if you call the random function from inside the document.write.
You will probably see other opportunities for optimization in the courses since breaking things down into individual steps can make the process easier to understand than the optimized version.