Dot product: Difference between revisions
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IO.puts Vector.dot_product([1,3,-5],[4,-2,-1])</lang>
{{out}}
<pre>
3
</pre>
=={{header|Elm}}==
{{trans|Elm}}
<lang Elm>dotp: List number -> List number -> Maybe number
dotp a b =
if List.length a /= List.length b then
Nothing
else
Just (List.sum <| List.map2 (*) a b)
dotp [1,3,-5] [4,-2,-1])</lang>
{{out}}
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