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Like it says in the title: What does The last statement in a 'do' construct must be an expression mean? I ended my do block with a putStrLn like it shows in several examples I’ve seen, and i get an error.
Code:
main = do args <- getArgs
file <-readFile "TWL06.txt"
putStrLn results
Most of the time, it’s because your code is mis-aligned and compiler assumes that your “do” block ended prematurely (or has extra code that dont really belong there)