Re: [Haskell-beginners] How can I view a digit on the N-th position of 9^(9^9) in Haskell?

Hello Francesco, Im total beginner. I read some books and online pages. I do not know, how to apply your rows if Im looking eg. digit on position  177486336 of the number string Sorry for asking so straightforward Sergej ---------- Původní e-mail ---------- Od: Francesco Ariis Komu: beginners@haskell.org Datum: 6. 6. 2019 22:13:36 Předmět: Re: [Haskell-beginners] How can I view a digit on the N-th position of 9^(9^9) in Haskell? "Hello Sergej, On Thu, Jun 06, 2019 at 09:06:00PM +0200, Sergej KAREL wrote:

Hello, Im looking for setting up a solver for the determination of digit on N-th position of the high value number

The trick is to only take the appropriate reminder instead of the whole multiplication result. Something like: λ> myMult x y = rem (x * y) 100 λ> :t +d foldr1 foldr1 :: (a -> a -> a) -> [a] -> a λ> myPower x y = foldr1 myMult (replicate y x) λ> myPower 9 9 89 λ> 9^9 387420489 λ> myPower 9 (myPower 9 9) 89 Does this help? -F _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners "