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.

JavaScript JavaScript Basics (Retired) Storing and Tracking Information with Variables Using String Methods

Stuck, have researched concepts but don't understand.

Instructions are: add a # symbol and lastName in uppercase to the end of the userName string. The final value of userName is "23188XTR#SMITH".

I'm struggling to understand the concepts here

app.js
var id = "23188xtr";
var lastName = "Smith";

var userName = id.toUpperCase();
var userName = id + lastName.toUpperCase();
index.html
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

2 Answers

Thomas Tilton-Heylin
Thomas Tilton-Heylin
12,098 Points
var id = "23188xtr";
var lastName = "Smith";

var userName = id.toUpperCase() + '#' + lastName.toUpperCase()
Antonio De Rose
Antonio De Rose
20,882 Points
var id = "23188xtr";
var lastName = "Smith";

var userName = id.toUpperCase(); //at this moment, userName variable gives 23188XTR, id is holding 23188xtr 
var userName = id + lastName.toUpperCase(); // now you are overwriting the userName variable from 23188XTR to 23188xtr, and concatenating the lastName which is Smith, which would result in -> 23188xtrSMITH

I did the exact same thing ,but it keeps showing " Bummer: The userName variable is "23188xtrSMITH" not "23188XTR#SMITH"."