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

Stephan Pearce
Stephan Pearce
257 Points
Posted by Stephan Pearce
Stephan Pearce
257 Points

Don't understand how this is wrong? Basic quick problem. Shouldn't += work in this situation?

I've gotten var Username to uppercase id correctly. But, I've got to uppercase lastName and add a # in between it, not working.

Use the JavaScript .toUpperCase( ) string method to assign an all uppercase version of the id variable to the userName variable.

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

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

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

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

There are two issues:

  1. The var keyword is used to create local variables, it should not be used when referencing existing ones. Your use of this keyword is what makes it invalid to use the += operator.

  2. You are not uppercasing the lastName variable.

If you fix those two issues like this:

var id = "23188xtr";
var lastName = "Smith";

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

Then your code will work. Though it can be shortened slightly by combining the last two lines together like this:

var id = "23188xtr";
var lastName = "Smith";

var userName = id.toUpperCase() + '#' + lastName.toUpperCase( );
Stephan Pearce
Stephan Pearce
257 Points
Stephan Pearce
Stephan Pearce
257 Points

Thank you! I had lastName going to Uppercase before I undid my work before my copy & paste. I didn't realize you had to drop the var while referencing a past variable. Thank you!