sets 2

 Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec  7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license()" for more information.

>>> ##union :-it gives common elements to both

>>> a={1,2,3,4,5,6}

>>> b={4,5,6,7,8,9}

>>> a|b

{1, 2, 3, 4, 5, 6, 7, 8, 9}

>>> a.union(b)

{1, 2, 3, 4, 5, 6, 7, 8, 9}

>>> ##above comment is for intersection, but that was union(elements of both sets without repetition)

>>> A&B##A intersection B, A n B

Traceback (most recent call last):

  File "<pyshell#6>", line 1, in <module>

    A&B##A intersection B, A n B

NameError: name 'A' is not defined

>>> ##A&B, A intersection B,    A n B

>>> A={10,20,30}

>>> B={20,30,40,50}

>>> A&B

{20, 30}

>>> A n B

SyntaxError: invalid syntax

>>> A-B

{10}

>>> B-A

{40, 50}

>>> ##difference :- checks values in order and gives values that is not in B,in case of A-B