set add() in python - GeeksforGeeks

The set add() method adds a given element to a set if the element is not present in the set.

Syntax:

set.add(elem)
The add() method doesn't add an element to the
set if it's already present in it otherwise it 
will get added to the set.
Parameters:
add() takes single parameter(elem) which needs to 
be added in the set.
Returns:
The add() method doesn't return any value.

# set of letters 
GEEK = {'g', 'e', 'k'} 
  
# adding 's' 
GEEK.add('s') 
print('Letters are:', GEEK) 
  
# adding 's' again 
GEEK.add('s') 
print('Letters are:', GEEK) 

Output:

('Letters are:', set(['k', 'e', 's', 'g']))
('Letters are:', set(['k', 'e', 's', 'g'])

Application:

It is used to add a new element to the set.

# set of letters 
GEEK = {6, 0, 4} 
  
# adding 1 
GEEK.add(1) 
print('Letters are:', GEEK) 
  
# adding 0  
GEEK.add(0) 
print('Letters are:', GEEK) 

Output:

('Letters are:', set([0, 1, 4, 6]))
('Letters are:', set([0, 1, 4, 6]))

Adding tuple to a set:

# Python code to demonstrate addition of tuple to a set. 
s = {'g', 'e', 'e', 'k', 's'} 
t = ('f', 'o') 
  
# adding tuple t to set s. 
s.add(t) 
  
print(s) 

Output :

{'k', 's', 'e', 'g', ('f', 'o')}

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