[Haskell-cafe] Int->[Char] conversion

[Tamas K Papp]

Hi,

I am working through Hal Daume's tutorial, trying to do the exercises.
I can't figure out how to output an integer with putStrLn (or any
other way), I think I need an Int -> [Char] conversion but couldn't
find it.  Specifically, in Exercise 3.10, I have the product of
numbers in pp, and would like to do 

putStrLn ("Product: " ++ convertnumbertostring(pp))

but I don't know which function does this...

Sorry for the extremely dumb question.

Thanks,

Tamas