[Haskell-cafe] Dividing integers?

Matias Hernandez matiash at artech.com.uy
Thu Mar 18 10:55:53 EST 2004

Hello there! 

Although you might not believe it since I'm going to ask a very very very basic question, I have been using Haskell for educational purposes for a couple semesters now. Nevertheless, I don't think I have ever worked with non-Int number types! :)

I don't understand why I get this error. I mean, apparently "/" is not defined for integers but I don't know how to "cast" the result of the length function into a Double...

Prelude> (length [1,2]) / 3
    No instance for (Fractional Int)
      arising from use of `/' at <interactive>:1
    In the definition of `it': it = (length [1, 2]) / 3

Besides, a simple integer division works:

Prelude> 2 / 3

But I would guess that's because '2' and '3' are parsed as Floats because they are used in a divide function.

Any help will be appreciated! 

Best regards,
- Matías

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