Benjamin L. Russell
Common Misunderstandings - HaskellWiki http://www.haskell.org/haskellwiki/Common_Misunderstandings
I thought I'd point out something wrong with the first beginner mistake listed on that page: -------- 1.1 Indentation ... ... What some miss is that then and else must be indented deeper than the if statement: if boolean then expr1 else expr2 ---------- My tests show that the 'then' and 'else' do not have to be indented more than the 'if': --bhask.hs myfunc x = if x == 2 then "hello" else "goodbye" Prelude> :load bhask.hs [1 of 1] Compiling Main ( bhask.hs, interpreted ) Ok, modules loaded: Main. *Main> myfunc 2 "hello" *Main> myfunc 3 "goodbye" In fact, 'then' and 'else' work for me when they are indented less than the 'if': --bhask.hs myfunc x = if x == 2 then "hello" else "goodbye" *Main> :load bhask.hs [1 of 1] Compiling Main ( bhask.hs, interpreted ) Ok, modules loaded: Main. *Main> myfunc 4 "goodbye" *Main> myfunc 5 "goodbye" *Main> myfunc 2 "hello" I don't if haskell changed its indenting rules or what, but that tip seems to be erroneous.