Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift Basics (retired) Collections What is an Array?

Challenge Task 2 of 2 is giving me an error. Why? println("\(todo.count)") will indeed give me the number of items.

When I insert this code into my own playground I get the correct answer: 3

var todo : [String] = ["Learn Swift", "Build App", "Deploy App"]

1 Answer

150,854 Points

Hi Randolph,

Because interpolation isn't absolutely necessary (the argument you're aiming to print is numerical), the code challenge doesn't seem to be expecting it (even if it would otherwise work.)


Hope this helps!

Thanks, CJ. That did the trick.