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  1. a :: Maybe String
  2. a = Nothing
  3. b = [a, Just "Hi"]
  4. c = [a, Just 'c']
  5.  
  6. main = print b
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
[1 of 1] Compiling Main             ( prog.hs, prog.o )

prog.hs:4:14:
    Couldn't match type `Char' with `[Char]'
    Expected type: String
      Actual type: Char
    In the first argument of `Just', namely 'c'
    In the expression: Just 'c'
    In the expression: [a, Just 'c']
stdout 
Standard output is empty
https://ideone.com/zqN7FJ
language:
Haskell (ghc 8.4.4)
created:
10 years ago
visibility:
public

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