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 Iterating through an Array

Posted by Paul Messmer
Paul Messmer
15,023 Points

what does this mean?

I keep getting this as an error "There was an error with your code: ReferenceError: Strict mode forbids implicit creation of global property 'i' "

script.js 
var temperatures = [100,90,99,80,70,65,30,10];

  for ( i = 0; i > temperatures.length; i += 0 ) {
  console.log( temperatures[i]);
  }
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

2 Answers

Victor Mercier
Victor Mercier
14,667 Points

Hi Paul, it seems that there is a logic problem in your code : 1.The i variable is not declared 2.The condition of the loop should be until i is smaller than items.length 3.You need to increase i by one every time the loop run, otherwise you will get an endless loop Here is my code:

  var temperatures = [100,90,99,80,70,65,30,10];
  for (let i = 0; i < temperatures.length; i += 1 ) {
  console.log( temperatures[i]);
  }

Don't forget to mark as best answer if it solved your issue!

Paul Messmer
Paul Messmer
15,023 Points
Paul Messmer
Paul Messmer
15,023 Points

oh thank you! those are simple mistakes!