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@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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