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 Quickstart Functions Write a Function

Jay Siddik
Jay Siddik
11,901 Points

Finally, call the add10 function and pass it one number value as the argument.

what am i doing wrong ?

script.js
function add10(num) {
 return num + 10;
}
function num(1);
index.html
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>
Andy tran
Andy tran
7,112 Points

you need to call the function and pass in the value. it should be like : add10(1);

1 Answer

Heidi Puk Hermann
Heidi Puk Hermann
33,366 Points

Like Andy Tran wrote in his comment. You only use the "function" keyword, when you declare your function. When you run it, you write the function name and then your input value(s) inside the parentheses. In your case it would look like this:

add10(1);