[Haskell] Generating a random Float number

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April 23rd, 2010, 08:27 AM

GStefanoni

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[Haskell] Generating a random Float number

Hi guys,

I'm trying to generate a random number in the interval [0.0,1.0]. It is straightforward for me to implement the function on ints:

Code:

rand :: IO Int
rand = do		r <- newStdGen
			let (x1, r2) = randomR (0,1) r
			print x1
			return x1

However, if I try to generate a Float instead, I always get an Arithmetic Overflow error that I can not understand.

Code:

rand :: IO Float
rand = do		r <- newStdGen
			let (x1, r2) = randomR (0.0::Float,1.0::Float) r
			print x1
			return x1

Do you have any clue why this happens?

Thanks in advance,

Giorgio

April 23rd, 2010, 04:04 PM

OmegaZero

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Join Date: May 2007

Posts: 737

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Works for me using GHC 6.8.3.

Can you provide a complete compilable program (or an interactive session) that shows the problem?

What compiler/interpreter are you using?

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