Can int value be assigned to id type + Objective c

Question

I want to know if this assignment is correct

id var = 9;

Will var be assigned the value 9 or do we have to wrap in some wrapper class like NSNumber?

Answer 1

9 is an integer literal, which is not an object. id is a pointer to an object. If you need to pass an integer as an object (type id) you have to wrap it inside a NSNumber object like this:

id var = [NSNumber numberWithInteger: 9];