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 Using Comparison Operators

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

I can't see my mistake

what I'm I using wrong

script.js 
var a = 10;
var b = 20;
var c = 30;
var a > b;
if (alert('a is greater than b)');{
} else {
  alert('a is not greater than b')
}
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>

2 Answers

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You would not use "var a > b;" as a statement in itself, that's not valid syntax.

The expression "a > b" should be part of the "if" statement. It would go between the parentheses instead of the alert call. Then the alert should go in the code block between the braces.

The second alert is placed correctly.

Aaron Goodrum
Aaron Goodrum
9,660 Points
Aaron Goodrum
Aaron Goodrum
9,660 Points 
var a = 10;
var b = 20;
var c = 30;

if(a>b) {
  alert('a is greater than b');
} else {
  alert('a is not greater than b');
}

//you dont need to set a other var for a>b. and it is a syntax error.