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

Julien Arseneau
seal-mask
.a{fill-rule:evenodd;}techdegree
Julien Arseneau
Full Stack JavaScript Techdegree Student 5,200 Points
Posted by Julien Arseneau
.a{fill-rule:evenodd;}techdegree
Julien Arseneau
Full Stack JavaScript Techdegree Student 5,200 Points

I don't understand why my loop never ends.

I don't understand why my loop never ends.

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

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

The final clause of the "for" determines what happens between the repeats, and your code has "i =+ 1". This causes the value of "i" to be continually re-set to 1 (+1) each time, so it will never exceed the length of list and meet the condition necessary to end.

You probably intended to write "i += 1" instead, which would raise the value of "i" each time.