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 Basics (Retired) Creating Reusable Code with Functions Giving Information to Functions

Posted by Obe Juarez
Obe Juarez
6,357 Points

Upper

Why is he using "Upper"? What does that do?

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

In this function, "upper" represents the parameter that is passed to the function to set the range of random numbers that will be produced. It's referred to as the "upper limit" which means that the random numbers picked by the function won't be any larger than that value.

Bozena Jablonski
Bozena Jablonski
4,944 Points
Bozena Jablonski
Bozena Jablonski
4,944 Points

Sorry if this seems dim, but is upper a predefined or set parameter because he uses it without quote marks?

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Parameter names, like variable names, never have quote marks. Anything in quote marks is a string literal.