[Haskell-beginners] Help on first program

[Brandon Allbery]

On Fri, Mar 28, 2014 at 7:10 PM, John M. Dlugosz
<ngnr63q02 at sneakemail.com>wrote:

> Each recursive call is either 1 or (n-1) so it should count down 5,4,3,2,1
> and stop the recursion.
>
What am I missing?


It doesn't magically stop at 0; Integer (inferred type) is signed.
Moreover, even if it were not signed, it would wrap around (or possibly
throw an exception on some CPUs, but not on Intel). You need to include a
check for 0 to stop the recursion.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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