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

Question about Variables - JavaScript

Hi guys, I'm stuck!

A variable named "boxWidth" already exists with a value of "640px". Create a new variable named "numWidth" and use the "parseInt" method to extract the numeric value from boxWidth's string value.

Here's my answer:

var numWidth = parseInt("boxWidth", 10);

What am i doing wrong?

Thanks!!

3 Answers

Erik Krieg
Erik Krieg
43,038 Points

This is not working because you have placed the variable name within quotations. This means you are passing parseInt a string instead of your variable.

Try this code:

var numWidth = parseInt(boxWidth, 10);

You should remove the quotes around boxWidth so you're referring to the variable boxWidth rather than the string "boxWidth."

The variable boxWidth has a string value of "640px," which will be converted by parseInt to an integer. Hope this helps! Please feel free to ask any further questions you need to.

[Erik's excellent response wasn't there when I started writing mine. I'd delete mine if I could, since I'm saying the same thing he is.]

It worked! Thank you guys!!!! :D