Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops For Loops

Sean Flanagan
Sean Flanagan
33,234 Points
Posted by Sean Flanagan
Sean Flanagan
33,234 Points

Why does nothing happen?

Hi.

When I run this code, no divs appear.

HTML:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Circles</title>
  <link rel="stylesheet" href="css/styles.css">
</head>
<body id="color">
<script src="js/script.js"></script>
</body>
</html>

JavaScript:

var html='';
for (var = 1; i <= 10; i += 1) {
  html += '<div>' + i + '</div>';
}
document.write(html);

Does anyone know please why there are no divs and what I should do?

Thanks

Sean :-)

1 Answer

Matt F.
Matt F.
9,518 Points
Matt F.
Matt F.
9,518 Points

Hello, all you need to do is put i after the variable declaration on line 2. Right now your loop does not 'see' a declaration for the variable i.

Change the second line of your JavaScript to 

for (var i = 1; i <= 10; i += 1) {

Hope this helps.

Sean Flanagan
Sean Flanagan
33,234 Points
Sean Flanagan
Sean Flanagan
33,234 Points

Hi Matt.

Thanks for this. I did as you advised and it worked a treat. You've been upvoted and nominated Best Answer.

Cheers!

Sean :-)