[Haskell-beginners] Meaning of variable'

Hi all, I'm looking at some Haskell code that has things like: var' <- function and also functions with names like: function' = ..... What does the tick mean?? Cheers, Erik -- ----------------------------------------------------------------- Erik de Castro Lopo ----------------------------------------------------------------- "Do I do everything in C++ and teach a course in advanced swearing?" -- David Beazley at IPC8, on choosing a language for teaching