UNION

Given two sets A and B, the UNION function returns a new set "A-plus-B", that is all the domains that are only in A plus all the domains that are only in B plus the domains that A and B have in common.

For example, given these two sets:

setOne:
    1
    1.01
    1.15
    1.17

setTwo:
    1.01
    1.15
    1.18

the statement:

var union = UNION(setOne, setTwo);

defines and populates the union set this way:

1
1.01
1.15
1.17
1.18

The syntax is:

UNION(set1, set2)

where set1 and set2 are set variables.