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) Storing and Tracking Information with Variables Using String Methods

luciana abbruzzese
luciana abbruzzese
2,199 Points

Problem in Javascript exercise. String concatenation

I´m trying to solve this but I´m stuck. Can you help me? Thanks

var userName = "23188xtr#"; var lastName = "Smith"; console.log('userName'.toUpperCase() + 'lastName'.toUpperCase());

var userName = "23188xtr#";
var lastName = "Smith";
console.log('userName'.toUpperCase() + 'lastName'.toUpperCase());
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
<script src="app.js"></script>


Remove the quotes from both userName and lastName of app.js, they are variables and not actual strings. You can add quotes to better space the output. console.log(userName.toUpperCase() +" "+ lastName.toUpperCase());

3 Answers

Per Karlsson
Per Karlsson
12,683 Points


Don't forget the # in between.

var userName = id.toUpperCase() + "#" + lastName.toUpperCase();

Good luck!

Hi Luciana,

Because you are targeting the variables userName and lastName, you don't want to put quote marks around them. You use quote marks for string elements.

So, you just need to change this:

console.log('userName'.toUpperCase() + 'lastName'.toUpperCase());

to this:

console.log(userName.toUpperCase() + lastName.toUpperCase());

Hope that helps,


luciana abbruzzese
luciana abbruzzese
2,199 Points

Thanks a lot to all for your help! I was complete lost and was very easy!!!