Hello, I'm new to Haskell and it seems like a very nice language to learn. However I'm not really familiar with the errormessages it produces. I am using a Helium interpreter. I've created the following module (however it is just a small sketch). I've written the following code: fac :: Int -> Int fac n = product[1..n] boven :: Int -> Int -> Int boven n k = (fac n) `div` fac k * fac (n-k) bin :: Int -> Int -> Int -> Int bin n k p |(n-k)>0 && k>0 = (boven n k) * (p^k) * (1-p)^(n-k) |(n-k)<0 && k>0 = (boven n k) * (p^k) * (1/((1-p)^(-(n-k)))) |(n-k)<0 && k<0 = (boven n k) * (1/(p^(-k))) * (1/((1-p)^(-(n-k)))) When I load this into my interpreter it says: Compiling ./Test.hs (11,55): Type error in infix application expression : 1 / ((1 - p) ^ (-(n - k))) operator : / type : Float -> Float -> Float does not match : Int -> Int -> Int (12,47): Type error in infix application expression : 1 / (p ^ (-k)) operator : / type : Float -> Float -> Float does not match : Int -> Int -> a (12,62): Type error in infix application expression : 1 / ((1 - p) ^ (-(n - k))) operator : / type : Float -> Float -> Float does not match : Int -> Int -> a Compilation failed with 3 errors Some details that might be usefull: Line 11 is |(n-k)<0 && k>0 = (boven n k) * (p^k) * (1/((1-p)^(-(n-k)))) Line 12 is |(n-k)<0 && k<0 = (boven n k) * (1/(p^(-k))) * (1/((1-p)^(-(n-k)))) So my question is: how can I fix these errors? (I used these lines of codes because it is not possible to use a negative exponent in the Helium interpreter.) Thank you for answering my question! Greetings JTKM