doing here you ask? Well, NSLog is a C function that handles printing a NSString to the console. It’s useful for debugging your application. We can create a new NSString using the syntax @"". NSLog can also create formatted strings, like Mr. Higgie is doing above. When we run this line of code, it will print this to the console: > Hello there, Eric. See how it replaces the %@ with the value from readersName? That %@ is just a placeholder, essentially saying "I'm going to be replaced by a variable that is also passed into NSLog". Those placeholders are replaced in the order they are defined. So, if we wanted Mr. Higgie to say both a first and last name, we’d do this: NSString *firstName = @"Eric"; NSString *lastName = @"Allam"; NSLog(@"Hello there, %@ %@.", firstName, lastName); And get this log: > Hello there, Eric Allam. Placeholders in NSLog are for a specific type of variable. The %@ placeholder holds the place of Objective-C objects like NSString and NSObject. Let's say we also wanted to print out the age of the person, and we stored the age in a variable of type int, like so: int age = 29; Instead of using %@, we use the placeholder for int which is %d: NSLog(@"Hello there, %@ %@. You've been alive for %d years.", firstName, lastName, age); > Hello there, Eric Allam. You've been alive for 29 years. You can find a list of placeholders, here. So far we've worked with 3 variables, NSString *firstName, NSString *lastName, and int age. These three variables all describe a single person, and it would be nice if there was some way to group them together. Stop teasing and just introduce objects already!