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21 lines
962 B
Haskell
21 lines
962 B
Haskell
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{- What is the difference between the sum of the squares and the square of the sums?
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The sum of the squares of the first ten natural numbers is,
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12 + 22 + ... + 102 = 385
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The square of the sum of the first ten natural numbers is,
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(1 + 2 + ... + 10)2 = 552 = 3025
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Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 385 = 2640.
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Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
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-}
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import Text.Printf
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squarediff n = do
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let squares = sum (map (^2) [1..n])
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let sums = sum [1..n] ^ 2
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sums - squares
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main = do
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printf "Difference between the sum of the squares and square of the sum of the first ten natural numbers is: %d\n" (squarediff 10 :: Integer)
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printf "Difference between the sum of the squares and square of the sum of the first hundred natural numbers is: %d\n" (squarediff 100 :: Integer)
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