[Haskell-beginners] '/' instead use 'DIV'. why?

17 Apr 2020

      Hi, 

Prelude> :t (/)
(/) :: Fractional a => a -> a -> a

Prelude> :t div
div :: Integral a => a -> a -> a

Prelude> 6 / length [23,34,45]
error 

Prelude> 6 / 3
2.0

Could somebody explain to me why this is?

thanks,

Alexander Chen