Could someone please explain me why as the output of the code below 6 numbers are printed?

Question

Could someone please explain me why as the output of the code below 6 numbers are printed?:
set1={1,2,3,4,5,6}
set2={4,5,6,7,8,9}
set1.add(7)
set2.add(10)
print(set1^set2)

Answer 1

Well done, guys, thank you very much ♥️

Answer 2

^ operator is used for symmetric difference.
~ swim ~ explained it well while I was typing 👍

Answer 3

De sexo