[Haskell-cafe] How do you make constant expressions?

Silly question, but I can't find the answer on the net. I think I'm just using the wrong words in my search. I'm looking for a way to create constant expressions in Haskell. The C/C++ equivalent of what I'm talking about is #define NAME VALUE I want an expression, or really just numbers for what I'm doing, that the compiler will put into the program at the designated places, instead of storing it in memory like a variable. -Eitan