[Haskell-cafe] Natural Numbers: Best implementation?

[Sebastian Fischer]

Hi Mark,

On Mar 13, 2009, at 3:54 AM, Mark Spezzano wrote:

> I was wondering what the best way to implement Natural number would  
> be. Is there a package which already does this?

there are two packages on Hackage that implement natural numbers using  
algebraic datatypes: 'numbers' has a module Data.Number.Natural that  
implements them in "unary" notation (zero and successor), 'nat' has  
Data.Number.Nat that uses a binary encoding.

Cheers,
Sebastian
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