[Haskell-beginners] Type assignment for List

[yi lu]

1

*Prelude> :t (:)*
*(:) :: a -> [a] -> [a]*

*xs will at least be a list of list.*

On Sun, Aug 9, 2015 at 12:21 PM, RAJATKUMAR ZALA <rajatkumarzala at yahoo.com>
wrote:

> Hello Friends,
>
> I am totally new to Haskell. I am learning Haskell from a website on my
> own pace. From that site, I came to know about list in haskell and its type
> assignment. There is a confusable question on site. I am posting question
> here....
>
>
>
> 1. Given that the expression []:xs is well typed, which of the following
> is not a possible type assignment for xs?
>
>
> Options:-
>
> 1. xs :: [Int]
> 2. xs :: [[Float]]
> 3. xs :: [[[Char]]]
> 4. xs :: [[[[Bool]]]]
>
>
> If any friend know about it then please clarify me on it.
>
> Thanks in advance
>
> Rajatkumar Zala
> India
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