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 Foundations Functions Return Values

2 Answers

Laura Cressman
Laura Cressman
12,548 Points

Here is a hint below. The idea is that you need to define a function that takes one parameter. Then you need to check if the parameter passed in is a string, undefined, or a number. If it is, you return 0. Otherwise, aka else, you need to return the length of the parameter. Does that help?

function arrayCounter(array){
  if (Check to see if the parameter is a string, number, undefined) {
    return 0;
  } else {
     return array.length;
  }
}