# in key word in sets and for loop 

s={'a','b','c'}

# in keyword to check if item present are not present 
# if 'a' in s : 
#     print("present")
# else:
#     print("not present")

# for item in s:
#      print(item) # set is a unorder collection 

# some math operation to implement in sets
# -------------------
# union --> two unit comman item to print only onbe times
# intersection --> two unit only print the comman point 
 
s1 = {1,2,3,4}
s2 ={3,4,5,6}

union = s1|s2
print(union)


intersection = s1 & s2
print(intersection)