Object declaration in Objective-C

Question

Is there any difference in declaring objects in Objective-C between (1) and (2), besides the style and personal preference?

(1) One-line declaration, allocation, initialization.

Student *myStudent = [[Student alloc] init];

(2) Multi-line declaration, allocation, initialization.

Student *myStudent;
myStudent = [Student alloc]; 
myStudent = [myStudent init];

Answer 1

No, there isn't a difference. The [Student alloc] just allocates memory for a pointer, meanwhile [myStudent init] actually sets the initial values.

If you are familiar with C, think of alloc as doing

Student *myStudent = calloc(1, sizeof(Student));

And the init call as a function that sets the initial values.