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

Can't get through step 2! what is wrong with my code?

Can someone tell me what is the matter with my code? why it doesn't pass step 2?

object.mm
id thing = nil;
NSNumber *thing = @4;

1 Answer

Hi there,

You don't need to declare thing as an NSNumber; you just need to assign an NSNumber to it:

thing = @4;

That should work fine.

Steve.

Thank you very much Steve:)