Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Add an Else If Clause

Anna Parker
PLUS
Anna Parker
Courses Plus Student 4,399 Points

else if challenge question

Can anyone tell me why this doesn't work?

Thank you!

script.js
var isAdmin = false;
var isStudent = true;

if ( isAdmin = true ) {
    alert('Welcome administrator');
} else if ( isStudent = true ) {
    alert('Welcome student');
}
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="script.js"></script>
</body>
</html>

1 Answer

Glenré Charl Labuschagné
Glenré Charl Labuschagné
23,204 Points

Hi Anna,

Using a single = is an assign operator in JavaScript [changing/setting the isAdmin to true ], using a double == is a comparison operator used to check "if" the isAdmin is true, or not (and if not runs the else if check/comparison). There is also a triple === that is even more strict (than the double ==), which require that the data types (in comparison) to be the same... Hope this helps.

Read more here