Use ghci in notepad ++
I have the following function:
suma :: (Integer, Integer) -> (Integer)
suma (x,y) = x + y
Running this on the console:
*Main> suma (3,5)
I get the following error:
<interactive>:6:1: error:
* Variable not in scope: suma :: (Integer, Integer) -> t
* Perhaps you meant 'sum' (imported from Prelude)
I found my own mistake. Maybe someone will serve you.
At first I had written the% SUMAR termination wrong and I saved that error.
You have to recompile after rewriting the function.
First in the console you have to put :r and then re-invoke the function with their respective parameters sumar (3,5)
The haskell parameters do not have that syntax, when writing sum (x, y) it will work but you are really passing a tuple. The correct syntax in this case would be:
suma :: Int -> Int -> Int
suma x y = x + y
As you can see, in haskell every meter is separated by spaces, also when calling the serious function:
suma 2 2