Mistake in an 'Objective-C Basics' Code Challenge

Hey! This is just a heads up for the treehouse developers...

In the 'Array Length' code challenge of 'Stage 3, Objective-C Basics', there's a problem with task 2 of 3.

Using the printf function print the size in bytes of the variable "real_numbers". Your output should look like the following: "Array real_numbers is x bytes."

For my response I would add (after the array created in the previous task):

printf("Array real_numbers is %ld bytes.", sizeof(real_numbers));

%ld because that is what we were taught to use in the prior video. Unfortunately, that won't pass because the question is expecting %lu for a long type value, which we wouldn't have any idea about.

Hope that helps you get it fixed! Thanks! The new course is fantastic.