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factorial n = factorial_helper 1 n

factorial_helper prod 0 = prod
factorial_helper prod n = factorial_helper (prod*n) (n-1)


main = print (factorial 5)
Success #stdin #stdout 0s 6224KB
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Standard input is empty
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120
https://ideone.com/hj4VfO
language:
Haskell (ghc 8.4.4)
created:
12 years ago
visibility:
public

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