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 Iterating through an Array

Daniela Fernandes Smith
PLUS
Daniela Fernandes Smith
Courses Plus Student 10,353 Points
Posted by Daniela Fernandes Smith
Daniela Fernandes Smith
Courses Plus Student 10,353 Points

My code didn't work and I'd like what's wrong with it

The code attached below is what I wrote, and I tried it in the console and nothing really happened. What am I missing, please? Should I create a function with the for loop and then call the function?

script.js 
var temperatures = [100,90,99,80,70,65,30,10];
for (var i = 0; i = temperatures.length; i += 1) {
  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

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,739 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,739 Points

Your condition to run is: i = temperatures.length. The result is i has been assigned a value of temperatures.length and you have created an infinite loop.

Try the following in a workspace and check the console:

var temperatures = [100,90,99,80,70,65,30,10];
var j = 0;

for (var i = 0; i = temperatures.length; i += 1) {
  console.log(temperatures[i]);
  console.log(i);

  j += 1;

  if (j > 10) {
    break; 
  }

}

Use i < temperatures.length instead.