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

khaled elfaham
khaled elfaham
3,779 Points

SyntaxError: script.js: Unexpected token `)` (2:37)

hello, İ keep getting this error but İ cant figure out what is wrong. any help would be appreciated, thanks.

script.js
var temperatures = [100,90,99,80,70,65,30,10];
for (i=0, i<temperature.length, i+=1) {
console.log(temperatures{i})
}
index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>
Noelle Szombathy
Noelle Szombathy
10,043 Points

Instead of using curly braces {} for "i" you should use brackets []. Also, in your for statement, you should declare the variable first and then use semicolons between the pieces instead of commas. As Steven noted below, you also need to pluralize temperatures in the iteration. Try this:

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

1 Answer

Steven Parker
Steven Parker
231,275 Points

There's a few issues:

  • the loop variable should be explicitly declared (using "var" or "let")
  • the array name is "temperatures" (plural), not "temperature" (singular)
  • the clauses of the "if" statement should be separated by semicolons instead of commas
  • indexing is done with brackets [] instead of braces {}