Objective C - Why do constants start with k

Question

Why do constants in all examples I\'ve seen always start with k? And should I #define constants in header or .m file?

I\'m new to Objective C, and I don\'t know C. I

Answer 1

I believe it is because of the former prevalence of Hungarian Notation, so k was chosen because c stood for character. ( http://en.wikipedia.org/wiki/Hungarian_notation )

--Alan