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

Oladejo Oluwatobi A
Oladejo Oluwatobi A
1,443 Points
Posted by Oladejo Oluwatobi A
Oladejo Oluwatobi A
1,443 Points

Am confused with how to use a for loop for this

Am stuck on this challenge

script.js 
var temperatures = [100,90,99,80,70,65,30,10];
for (var i = temperatures.unshift()) {
  console.log(i);
}
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

1 Answer

Mustafa Khan
Mustafa Khan
6,224 Points
Mustafa Khan
Mustafa Khan
6,224 Points

Your loop is incomplete. First of all, var i should be equal to 0, since arrays start with 0, not temperatures.unshift. You can display something in an array without taking it out. Then, the variable i has to be less than the length of the array. You could type in 8, but it's a best practice to use the .length property, in case you want to add or remove things from the array. so i is less than temperatures.length. Lastly, I has to increase each time, so you can write i+=1, so it increases by 1 each time. Now that your loop is correct, you also need to fix the console.log. It will just display the number, because it doesn't know you're referring to the array. Fix this by replacing it with temperatures[i]. Hope this helps!