What does having two asterisk ** in Objective-C mean?

Question

I understand having one asterisk * is a pointer, what does having two ** mean?

I stumble upon this from the documentation:

- (NSAppleEventDescriptor          


        

Answer 1

In C pointers and arrays can be treated the same, meaning e.g. char* is a string (array of chars). If you want to pass an array of arrays (e.g. many strings) to a function you can use char**.