Prolog arithmetic syntax

Question

How to define a as a integer/float number ?

I want to find the results of a+b+c+d=10 where a,b,c,d is integer and >=0.

Answer 1

Here is a simple, modern, pure Prolog, non-CLP-library solution:

range(X):-
        member(X,[0,1,2,3,4,5,6,7,8,9,10]).

ten(A,B,C,D):-
        range(A),
        range(B),
        range(C),
        range(D),
        10 =:= A + B + C + D.