How do I add two sets?

a = {'a', 'b', 'c'} 
b = {'d', 'e', 'f'}

I want to add above two set values. I need output like

c = {'a', 'b', 'c', 'd', 'e', 'f'}

All you have to do to combine them is

c = a | b

Sets are unordered sequences of unique values. a | b or a.union(b) is the union of the two sets (a new set with all values found in either set). This is a class of operation called a "set operation", which Python sets provide convenient tools for.

You can use .update() to combine set b into set a. Try this:

a = {'a', 'b', 'c'}
b = {'d', 'e', 'f'}
a.update(b)
print(a)

To create a new set, c you first need to .copy() the first set:

c = a.copy()
c.update(b)
print(c)

You can use the result of union() of a and b in c. Note: sorted() is used to print sorted output

    a = {'a','b','c'} 
    b = {'d','e','f'}
    c=a.union(b)
    print(sorted(c)) #this will print a sorted list

Or simply print unsorted union of a and

    print(c)  #this will print set c