What is an idiomatic way to add lists in Haskell?

Question

Suppose I want to add two lists in Haskell. What is the most usual way to do this?

Here\'s what I did:

addLists :: (Integral a) => [a] -> [a]          


        

Answer 1

There is a zipWith library function that combines two lists by using a supplied function. It does exactly what you want here and you get:

addLists = zipWith (+)

This uses (+) to combine the elements of lists given as further arguments.