Thanks for the info, and the link. I probably should have guessed the Double vs Float one. I did program in C a while ago... Cheers, Daniel. Jared Updike wrote:

Int is for bounded values -2**32 to 2**32 (I think... maybe 2**-31 and 2**31 or less if it's boxed?) based on the underlying machine representation. Integer is unbounded (arbitrary precision, i.e. 7489571948579148758174534 is a valid Integer). Double is for floating point values corresponding to C doubles, in hardware (on 32 bit machines, 64 bit entities) and Floats are half that precision, i.e. 32 bits on 32 bit machines, corresponding to C floats.

see http://www.haskell.org/onlinereport/basic.html#sect6.3 and http://www.haskell.org/onlinereport/basic.html#sect6.4 for more info.

Jared.

On 12/18/05, Daniel Carrera wrote:

...

Hello all,

I found a good Haskell tutorial (second link on the Tutorials column) (now that I know how to run the programs in it). I have a question. What's the difference between the types Int and Integer? Likewise, what's the difference between the types Float and Double? Are those just synonims?

Thanks for the help.

Cheers, Daniel. -- /\/`) http://oooauthors.org /\/_/ http://opendocumentfellowship.org /\/_/ \/_/ I am not over-weight, I am under-tall. / _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

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On Monday 19 December 2005 11:26, Wolfgang Jeltsch wrote:

Am Montag, 19. Dezember 2005 01:10 schrieb Jared Updike:

...

Int is for bounded values -2**32 to 2**32 (I think... maybe 2**-31 and 2**31 or less if it's boxed?) based on the underlying machine representation.

Not really true. As far as I remember, the Haskell Report just says that Int covers at least the integers from -2^27 to 2^27 - 1. The range for Int can be higher than the range just given. For 32-bit machines it will probably be -2^31 to 2^31 - 1 but there's no guarantee for that.

http://www.haskell.org/onlinelibrary/basic.html 6.4 Numbers ... The finite-precision integer type Int covers at least the range [ - 2^29, 2^29 - 1]. As Int is an instance of the Bounded class, maxBound and minBound can be used to determine the exact Int range defined by an implementation. ... Ben