• The union() method returns a new set with distinct elements from each and every one of the sets.
• The union of two or more sets is the set of all distinct elements shown in all the sets.

• • A = {1, 2}
  • B = {2, 3, 4}
  • C = {5}

Then,

• A∪B = B∪A ={1, 2, 3, 4}
• A∪C = C∪A ={1, 2, 5}
• B∪C = C∪B ={2, 3, 4, 5}
• A∪B∪C = {1, 2, 3, 4, 5}