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

saisindhoorreddy palla
saisindhoorreddy palla
1,146 Points

i got following problem

i need the code and what is thee problem plz?

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

 var userName= id.toUpperCase();
 var userName= userName+'#'+LastName.toUpperCase();
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
<script src="app.js"></script>
Gustavo Winter
Gustavo Winter
Courses Plus Student 27,382 Points

check this line:

var userName= userName+'#'+LastName.toUpperCase();

Var cant start with capitalized letters

2 Answers

Juan Luna Ramirez
Juan Luna Ramirez
9,038 Points

Javascript is case sensitive. You have LastName when it should be lastName.

This is a ReferenceError since LastName with capital L does not exist.

Christopher Debove
Christopher Debove
Courses Plus Student 18,373 Points

Gustavo Winter please don't introduce false informations.

Variables can start with uppercase letter, the problem is that his variable was named "lastName" and variable names are case sensitive.

Gustavo Winter
Gustavo Winter
Courses Plus Student 27,382 Points

Christopher Debove Sorry, i dont want to introduce false informations. But until know variables cant start with uppercase letter. The same for start with numbers.

but, if its possible, thank you for correct me and sorry for the false information.

Christopher Debove
Christopher Debove
Courses Plus Student 18,373 Points

To be more precise, variables name are written in lower camel case by convention. But starting a variable name with an uppercase character is valid.

Those are all valid in JS :


Those are not valid :