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

Posted by Mathew Yangang
Mathew Yangang
4,433 Points

using upper cases

This question is a little bit confusing, do i have to write a whole new line or add the # symbol and last Name, if so where do i make the changes?

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

var userName = id.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>

4 Answers

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

You should add onto userName using string concatenation so that the final value would read 23188XTR#SMITH. This is all done on the same line you declared the userName variable. Does that clear things up any?

Mathew Yangang
Mathew Yangang
4,433 Points
Mathew Yangang
Mathew Yangang
4,433 Points

So I just add #SMITH next to id on the variable username?

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

You're going to add the string "#" and then add the uppercase lastName variable using .toUpperCase() like you did with the id variable. I can give you the answer.

Mathew Yangang
Mathew Yangang
4,433 Points
Mathew Yangang
Mathew Yangang
4,433 Points

So we need to upper case declarations on the same line of code?

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

Sure. It's probably best to place it on the same line though you don't technically have to:

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

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

Is equal to:

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

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

As you can see it's much easier to read it when it's on one line. It's also much faster to write!

Mathew Yangang
Mathew Yangang
4,433 Points
Mathew Yangang
Mathew Yangang
4,433 Points

Thanks Matthew!