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 Tracking Multiple Items with Arrays Create an Array

Gunter Schroder
Gunter Schroder
2,804 Points

Asked to create an array named data with any 3 numbers in it. Why does this not work?

var data = ['1', '2', '3'];

script.js
var data = ['1', '2', '3'];
index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

4 Answers

Seth Kroger
Seth Kroger
56,392 Points

Because you have quotes around the values, they're considered strings, not numbers.

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 90,689 Points

Hi Gunter.

It's because you're trying to put your numbers in quotes which turns them into strings. Anything put into quotes like in your example JavaScript treats as a string so you should take them out :-)

Gunter Schroder
Gunter Schroder
2,804 Points

Ahh....Thanks Seth and Jonathan! Much appreciated!

Sean Do
Sean Do
11,933 Points
var data = ['1', '2', '3'];

You're submitting the numbers as a String. Remove the single quotations.