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 Objective-C Basics (Retired) Advanced Objective-C Dynamic Typing

How do I declare a variable named thing of type id & initialize it to nil? Thank you!

Any helpful hints would be greatly appreciated. Thanks

object.mm
Thing *thing = [[Thing alloc]init];

1 Answer

Chris Shaw
Chris Shaw
26,650 Points

Hi Eric,

For this task all we need to do is use the type id which is a universal type that accepts any value, for the value we just need to assign the value nil.

id thing = nil;

Happy coding!

Hi Chris, thanks very much for your help! Very much appreciated. All the best.