union ( bag : Bag(T) ) : Bag(T)

Returns a Bag containing all elements of self and all elements of *bag*.

Expression	Result
Bag{'a', 'b', 'a'}->union(Bag{'b', 'c'})	Bag{'a', 'b', 'a', 'c'}
Set{1,2,3}->union(Set{2,3,4})	Set{1,2,3,4}

Video: https://www.youtube.com/watch?v=-vBshXtEPts

Example 1: Bags

Expression:

Bag{'a', 'b', 'a'}->union(Bag{'b', 'c'})

Result:

Bag{'a', 'b', 'a', 'c'}

• All elements from both Bags are included.

• 'a' appears twice because Bags allow duplicates.

Example 2: Sets

Expression:

Set{1,2,3}->union(Set{2,3,4})

Result:

Set{1,2,3,4}

• All unique elements from both Sets are included.

• Duplicates are automatically removed.