0rphee

isPrime :: Int -> Int
isPrime = helper 2
  where helper :: Int -> Int -> Int
        helper count num
          | prime = if count <= div num 2
                    then helper (count+1) num
                    else 1
          | otherwise = 0
          where prime = (num == 2) || (mod num count /= 0)

0rphee

-- Follow instructions from (https://www.haskell.org/ghcup/) to install Haskell-Language-Server 

-- Neither do code actions nor code lenses are available when selecting eligible code, while in other 
-- editors they are available

-- More code actions are available in other editors
-- func xs = sum xs
-- func = sum
func :: (Foldable t, Num a)=> t a -> a
func xs = foldl (+) 0 xs