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I’ve been following a Learn Haskell in 10 Minutes tutorial. Everything was going well until I reached this line:
do { n <- readLn ; print (n^2) }
It won’t execute in ghci, and in Leksah I get the following error.
Parse error: naked expression at top level
I’ve tried updating cabal and installing foo, but the problem continues.
Your help would be greatly appreciated.
I’m using Ubuntu 11.10.
It’s not freezing, it’s waiting for input. Try typing a number and pressing Enter.