What does the "and" keyword mean in Objective-C?

Question

I was typing a comment in Xcode, but forgot the leading //. I noticed that and was highlighted like a keyword. I did a bit of Googling, but I can't seem to figure out what it does (or even if it's a real keyword).

What does it mean?

Answer 1

It is not a keyword. Objective-C shares exactly the same keywords as C with additional ones that always start with '@'.

EDIT: This question doesn't answer the original post (see Rob Napier's succint answer for this), but rather it highlights that 'and' is a macro in some standard library headers and not a reserved word.

Quote from the C standard (C11, n1570), page 58:

6.4.1 Keywords

keyword: one of auto, break, case, ... [list of words not including 'and']

Answer 2

It's a synonym for &&. See iso646.h.