The problem is that currying is useful for so many things that this is a bit like asking 'what is addition useful for?' Currying can always be implemented just

The problem is that currying is useful for so many things that this is a bit like asking 'what is addition useful for?' Currying can always be implemented just by lambdas, so it does not actually enable any new behaviour, but it makes a lot of things simpler - any time you want to close over values, it can normally be neatened by using currying. Let's say you're making a 3D renderer. You have a list of vertices (points) in object space, and you want to transform them to screenspace by multiplying by a modelview matrix and then a projection matrix. Without currying: vectors fmap (\x -> multiply modelview x ) fmap (\x -> multiply projection x) With currying: vectors fmap (multiply modelview) fmap (multiply projection)