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add PerfectNumber.hs #45

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11 changes: 11 additions & 0 deletions src/Maths/PerfectNumber.hs
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Original file line number Diff line number Diff line change
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module Maths.PerfectNumber where

sumList :: [Int] -> Int
sumList [] = 0
sumList (x:xs) = x + sumList xs

perfectNumber :: Int -> Bool
perfectNumber num = sumList [ x | x <- [1 .. num -1], num `mod` x == 0] == num

main = do
print (perfectNumber 6)