# 99 questions/Solutions/4

### From HaskellWiki

< 99 questions | Solutions(Difference between revisions)

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<haskell> |
<haskell> |
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myLength :: [a] -> Int |
myLength :: [a] -> Int |
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− | myLength = foldr (\x n -> n + 1) 0 |
+ | myLength = foldr (\n x -> n + 1) 0 |

</haskell> |
</haskell> |
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## Revision as of 01:15, 15 September 2010

(*) Find the number of elements of a list.

myLength :: [a] -> Int myLength [] = 0 myLength (_:xs) = 1 + myLength xs

myLength :: [a] -> Int myLength = foldr (\n x -> n + 1) 0

length

Prelude