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Successive prime differences: Difference between revisions
m
→{{header|Haskell}}
Line 616:
| otherwise = getGroups (tail ps)
getGroups (x:xs) = getGroups xs
groups :: Result
groups = getGroups oneMillionPrimes
showGroup :: String -> IO ()
Line 621 ⟶ 624:
putStrLn $ "Differences of " ++ group ++ ": " ++ show (length r)
putStrLn $ "First: " ++ show (head r) ++ "\nLast: " ++ show (last r) ++ "\n"
where r = foldr (\(a, b) c -> if a == group then b : c else c) []
main :: IO ()
main = showGroup "2" >> showGroup "1" >> showGroup "(2 2)" >> showGroup "(2 4)" >> showGroup "(4 2)"
>> showGroup "(6 4 2)"</lang>
{{out}}
<pre>
| |||