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

Joseph Spirito
Joseph Spirito
11,007 Points

Unexpected Token?

I am trying to log the array with a loop. What I'm lost on is why the "<" is an "unexpected token".

script.js
var temperatures = [100,90,99,80,70,65,30,10];
for (var i = 0, i < temperatures.length, i += 1) {
  var weather = temperatures.shift();
  console.log(weather);
}
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

Michael Hulet
Michael Hulet
47,913 Points

The proper separator inside a for loop is a semicolon (;), not a comma (,). There are a few scenarios when JavaScript could interpret a stray comma as valid, but in no scenario will there be a comparison afterward, so the first place where the interpreter realizes something is wrong is when it sees a comparison operator, so that's why it's telling you that's the out-of-place token. If you change the commas (,) in your for loop to semicolons (;), your code should run just fine