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

Posted by Connor Croteau
Connor Croteau
1,160 Points

How do you do this question? I don't understand how to incorporate the temperatures array correctly.

What am I doing wrong here?

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

for (i = 0; i < temperatures.length; i += 1) {
 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>

3 Answers

Logan R
Logan R
22,989 Points
Logan R
Logan R
22,989 Points

You're mostly there!

To get the value from an array, you must first do the name of the array, followed by the offset in [].

So for example:

var myArray = [10, 40, 50]

So say that I wanted the 40 from the array. I would get this by using an offset of 1 (Starting from 0):

console.log(myArray[1]);

So in this instance, you want an offset of i.

Does that make sense?

Connor Croteau
Connor Croteau
1,160 Points
Connor Croteau
Connor Croteau
1,160 Points

Hmmm but how do you log the array out in order then? Whats the syntax for that?

Amos Dailey
Amos Dailey
18,885 Points
Amos Dailey
Amos Dailey
18,885 Points

Inside your loop you will log the array out using the var "i" as the counter.

So the first time through the loop, "i" will be 0. then it hits console.log(temperature[i]); ///Which is the same as console.log(temperature[0]);

And on the next iteration through the loop "i" will be one. So... console.log(temperature[i]); ///Which is the same as console.log(temperature[1]);

And so on till you get to the length of the array.