Syntax

	union($set1,$set2, ..., $setN)

Description

Calculates the union of the sets set1,... setN.

Parameters

Name	Type	Description	Mandatory	Default
set	Set	Sets that are to be combined into a single set.	yes

Return value

Type: Set

A set containing all elements of the sets set1,... setN. No duplicates will be added, even if multiple sets contain the same elements.

Examples

Simple union

	union(list(1, 2, 3), list(4, 5, 6), list(7, 8, 9))

Output: A set with the elements [1, 2, 3, 4, 5, 6, 7, 8, 9].

Union of duplicates

	union(list(1, 2, 3), list(1, 2, 3, 4, 5))

Output: A set with the elements [1, 2, 3, 4, 5].

The numbers 1 and 2 are added only once, because a set must not contain duplicates.