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 Loops, Arrays and Objects Tracking Multiple Items with Arrays Build a Quiz Challenge, Part 1

You Ni
PLUS
You Ni
Courses Plus Student 2,397 Points
Posted by You Ni
You Ni
Courses Plus Student 2,397 Points

Why my code isn't work?

My code keep showing the sing error like this

Uncaught TypeError: Cannot read property '0' of undefined at quiz.js:43

why~?

https://w.trhou.se/91sh0pq57r

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

The length of qss is 3. But the indexing goes from 0 to 2. So your for loop should not include = qss.length. It should just be:

for(var i = 0 ; i < qss.length ; i++)