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 Random Number Challenge

Posted by Carla Hiner
Carla Hiner
7,656 Points

randomNumber is undefined error in console. not sure what I'm doing wrong here.

Here is my code:

function getRandomNumber(upper, lower) { var randomNumber = Math.floor(Math.random() * (upper - lower + 1)) + lower; return randomNumber; }

getRandomNumber(100, 50); alert(randomNumber);

1 Answer

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

:point_right: Your randomNumber variable only exists inside the function.

But the function returns it, so you can display it this way:

alert(getRandomNumber(100, 50));
Carla Hiner
Carla Hiner
7,656 Points

Thanks, Steven! I knew I was missing something simple, but I couldn't see it.