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 Patrick Gribbin
Patrick Gribbin
Courses Plus Student 2,838 Points

This should work...Shouldn't it?

This is the error I get when run my code to iterate through this array of temperatures. It should work but what am I missing?

Error is:

There was an error with your code: TypeError: 'undefined' is not an object (evaluating 'console.log._args[i][0]')

code is as follows:

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

for (var i = 0; i < temperatures.length ; i += 1){ if ( largest < temperatures[i]) {

 largest = temperatures[i]; 

}

}

console.log(largest);

Any and all help would be awesome on this. I have racked my brain on this for a few hours now and everything I have tried does not work. I may be over thinking it.

script.js 
var temperatures = [100,90,99,80,70,65,30,10];
var largest = 0;

for (var i = 0; i < temperatures.length ; i += 1){
        if ( largest < temperatures[i]) {

     largest = temperatures[i]; 

    }

}

console.log(largest);
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

Junjie Huang
Junjie Huang
4,704 Points
Junjie Huang
Junjie Huang
4,704 Points

Hi Patrick,

Use a for or while loop to iterate through the values in the temperatures array from the first item -- 100 -- to the last -- 10. Inside the loop, log the current array value to the console.

Based on the question, you need to print out all elements in the array (not the largest value).

Patrick Gribbin
PLUS
Patrick Gribbin
Courses Plus Student 2,838 Points
Patrick Gribbin
Patrick Gribbin
Courses Plus Student 2,838 Points

Hey thanks for your help on this. I was just over thinking this problem.