Question

can someone tell me why there is a * in the line?

What does it mean for the declaration?

NSString *someString;

Thank you guys

edit:

Thank you it helps me a lot but sometimes i see declarations without *
example:

BOOL areTheyDifferent; why there is no pointer in this declaration?

Answer 1

the * character means “pointer” in the C world (which Objective-C lives in)

someString is a pointer to an NSString object.

In Objective-C, you rarely need to worry about that fact, since all objects are passed around as pointers. You simply treat that someString variable as if it was an instance of the NSString class.