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

peterson st gourdain
peterson st gourdain
931 Points
Posted by peterson st gourdain
peterson st gourdain
931 Points

I don't get it

help

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

var userName.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

glasscheck
glasscheck
7,302 Points
glasscheck
glasscheck
7,302 Points 
var userName = id.toUpperCase()
Viktor Doska
Viktor Doska
2,138 Points
Viktor Doska
Viktor Doska
2,138 Points

You don't understand it because this code does almost nothing, especially the last line

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

This 2 lines of code make two new variables and set them with values.

var userName.toUpperCase();

This line makes a new variable userName but there is no value in it!(actually there is but this is for later) So you just use toUpperCase() method with empty variable. I think you wanted to do what @glasscheck suggests