Objective C class public members

Assuming you have:

1)

@interface Car:NSObject{
    NSString *name;
}

//name is private

2)
@interface Car:NSObject{
    NSString *name;
}
@property(nonatomic, retain) NSString *name;

//name is public

//nonatomic means that there is are no problems with multithreading

//reatin means that the setter is now owing the new value ; Usually this
what will be used.
//assign might be used for non object types like BOOL
//copy might be used for NSString

3) Adding:
@synthesize name 

//No need to implement getName / setName