Re: [Haskell-beginners] assistance please ?

You can do something like fibTable n = [ show x ++ "\t" ++ show y | (x,y) <- zip [1..] (fibs n) ] where fibs n = list containing fibonacci numbers from fib(1) to fib(n) On 11 November 2015 at 18:57, Roelof Wobben wrote:

Op 11-11-2015 om 14:11 schreef Sumit Sahrawat, Maths & Computing, IIT (BHU):

Hint 1) fib n = fib (n - 1) + fib (n - 2), with proper base cases

oke, so use recursion. No problem.

Hint 2) use mapM_ to print a list of pairs, where the list is created by zipping [1..] with the list of fibonacci numbers

mapM_ is not explained in the first 5 chapters of Craft of functional programming,

Can not both or one of the two be done with list comprehension because all former exercises uses list comprehension

Roelof

On 11 November 2015 at 18:29, Roelof Wobben wrote:

...

Hello,

I have this exercise :

Define a function fibTable :: Integer -> String which produces a table of Fibonacci numbers. For instance, the effect of putStr (fibTable 6) should be n fib n 0 0 1 1 2 1 3 2 4 3 5 5 6 8

1) Can somone give me any pointers how to calculate the fibb numbers with list comprehension. I know that the fib numbers are (n -1) + n

2) Can someone give me any pointers how to write the outcome of every run

Roelof

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Sumit Sahrawat

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