x + y
i1 : set{a,b,c} + set{a,d,f} o1 = set {c, d, f, a, b} o1 : Set
i2 : union(set{a,b,c}, set{a,d,f}, set{a,c,e}) o2 = set {c, d, e, f, a, b} o2 : Set
The function sum can be used to form the union of a list of sets, but this can be slow for long lists.
i3 : x = apply(3, i -> set apply(3, j -> 10*i+j)) o3 = {set {0, 1, 2}, set {12, 10, 11}, set {20, 21, 22}} o3 : List
i4 : sum x o4 = set {0, 1, 2, 20, 21, 22, 10, 11, 12} o4 : Set