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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Iterating through an Array

John Hay
PLUS
John Hay
Courses Plus Student 3,478 Points

Loop not working?

Can someone tell me why this isn't working?

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

for(var i = 0; i < temperatures.length; i++){ console.log( i ); }

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

for(var i = 0; i < temperatures.length; i++){
  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>

2 Answers

Shadab Khan
Shadab Khan
5,470 Points

Hi John,

Your for loop is perfect, but you need to loop through all the items in the array. In your case, you are only looping through the for-loop index, which is 'i'.

The following code should work.

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

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

See how I use temperatures[i] instead of only i above in the console.log function..?

Let me know if there are any further questions. All the best!

John Hay
PLUS
John Hay
Courses Plus Student 3,478 Points

Thanks...I spotted what I had done shortly after posting the question. Time for a break I think! Thanks for you prompt reply though =D