Using subtract predicate in swi prolog -

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i need subtract numbers given list. use swi prolog. did.

subtract([1,4],[1,2,3,4,5],'l')

but doesnt seem working in swi prolog..pls me....

l needs variable, name must without quotes, this:

subtract([1,4],[1,2,3,4,5],l).

this produces empty list, because both 1 , 4 in larger list. if switch lists around, l [2,3,5]:

subtract([1,2,3,4,5],[1,4],l).

here demo on ideone.


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