Smallest multiple: Difference between revisions

=={{header|Haskell}}==

<lang haskell>import Text.Printf (printf)

--- SMALLEST INTEGER EVENLY DIVISIBLE BY EACH OF [1..N] --

smallest :: Integer -> Integer

smallest =

foldr lcm 1 . enumFromTo 1

--------------------------- TEST -------------------------

main :: IO ()

main =

(putStrLn . unlines) $

showSmallest <$> [10, 20, 200, 2000]

------------------------- DISPLAY ------------------------

showSmallest :: Integer -> String

showSmallest =

((<>) . (<> " -> ") . printf "%4d")

<*> (printf "%d" . smallest)</lang>

{{Out}}

<pre> 10 -> 2520

20 -> 232792560

200 -> 337293588832926264639465766794841407432394382785157234228847021917234018060677390066992000

2000 -> 151117794877444315307536308337572822173736308853579339903227904473000476322347234655122160866668946941993951014270933512030194957221371956828843521568082173786251242333157830450435623211664308500316844478617809101158220672108895053508829266120497031742749376045929890296052805527212315382805219353316270742572401962035464878235703759464796806075131056520079836955770415021318508272982103736658633390411347759000563271226062182345964184167346918225243856348794013355418404695826256911622054015423611375261945905974225257659010379414787547681984112941581325198396634685659217861208771400322507388161967513719166366839894214040787733471287845629833993885413462225294548785581641804620417256563685280586511301918399010451347815776570842790738545306707750937624267501103840324470083425714138183905657667736579430274197734179172691637931540695631396056193786415805463680000</pre>