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 Foundations Numbers Parsing Numbers From Strings

Posted by Hiromi De Young
Hiromi De Young
2,671 Points

parseInt

This is the question I had: "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.", and my answer was,

var numWidth = parseInt("640px", 10);

Can you tell me what I did wrong?

3 Answers

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

Just read the task again: ... variable named "boxWidth" already exists with a value of "640px"...

So, you should be parsing the value stored in the variable (by passing the variable as the first argument), not a string literal.

Hiromi De Young
Hiromi De Young
2,671 Points
Hiromi De Young
Hiromi De Young
2,671 Points

Okay. I got it! Thank you :)