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 Simplify Repetitive Tasks with Loops What are Loops?

Michal Janek
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Michal Janek
Front End Web Development Techdegree Graduate 30,654 Points
Posted by Michal Janek
.a{fill-rule:evenodd;}techdegree seal-36
Michal Janek
Front End Web Development Techdegree Graduate 30,654 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?

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 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.