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let x = 2 in let y = -2 in if x^2==y^2 then 1 else 2
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Frage 2
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length (words ("One Two Three" ++ "Four"))
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Frage 3
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23 `mod` 8 `mod` 5
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Frage 4
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head (tail [3,4,5])
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Frage 5
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let x = x+3 in fst (snd (x+1,(5,x-2)))
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Frage 6
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xs = [1,2,3,4,5]
take 3 xs
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reverse (tail (reverse (tail xs)))
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tail (tail (tail xs))
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reverse (tail (tail (reverse xs)))
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reverse (drop 2 (reverse xs))
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reverse (reverse (take 3 xs))
Frage 7
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xs = [1,2,3,4,5]
take 3 xs
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reverse (tail (reverse (tail xs)))
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tail (tail (tail xs))
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reverse (tail (tail (reverse xs)))
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reverse (drop 2 (reverse xs))
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reverse (reverse (take 3 xs))
Frage 8
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ys = [1,2,3,4]
last (init ys)
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fst (drop 2 ys)
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reverse (init ys)
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fst (drop 1 (reverse ys))
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head (drop 2 ys)
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snd (drop 2 (reverse ys))
Frage 9
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xs = [1,2,3,4,5,6]
reverse (init xs)
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reverse (tail xs)
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tail (reverse xs)
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reverse (take 5 xs)
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reverse (drop 1 xs)
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drop 1 (reverse xs)
Frage 10
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ys = [1,2,3,4,5]
init (init (init ys))
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take 2 ys
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take 3 ys
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drop 3 (reverse ys)
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reverse (drop 3 (reverse ys))
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reverse (tail (reverse (init ys)))
Frage 11
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What is the standard prelude?
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Contains predefined classes, types and functions, implicitly imported into every Haskell program.
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Contains advanced I/O functions.
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