UndoManager and groupingLevel

[alexrrr]

Hello Everyone, one quick question:

Im starting with Aaron's book (page 150) learning about the undomanager, there is this one piece of code that reads:

if([undo groupingLevel])

But I've checked the documentation and a NSInteger is returned from that instance method.

Return Value
An integer indicating the number of nested groups. If 0 is returned, there is no open undo or redo group.

Is 0 the same as FALSE in Obj-C/Cocoa?

Greetings,


Alex