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

Dave Molinero
Dave Molinero
6,416 Points

When I complete the code and click "Check Work", I get the "Oh no! There was a communication error" alert.

When I complete the code and click "Check Work", I get the "Oh no! There was a communication error" alert.

I have tried refreshing, restarting the browser, and using multiple browsers, but I get the error every time.

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>

2 Answers

Erik McClintock
Erik McClintock
45,783 Points

Dave,

You have some errors with your for loop. Firstly, remember: You're iterating through items in the 'temperatures' array, so you need to make sure you're logging the value that is stored at the index of that array that you're currently on. Lastly, you need to increment your counter with += or ++ to make sure that i is adding 1 to itself.

You have:

for ( i = 0; i < temperatures.length; i + 1 ) {
  console.log( i );
}

You need:

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

When I make those changes, the task passes.

Erik

Erik explained but "i + 1" basically made your program into an infinite loop.