Add Items

Sets are mutable, which means you can modify them after creation by adding new elements. Python provides several ways to add items to a set:

1. Using add() Method:

   The add() method adds a single element to the set. If the element is already present, the set remains unchanged.

   fruits = {"apple", "banana", "cherry"}
   fruits.add("date")
   print(fruits)  # Output: {'apple', 'banana', 'cherry', 'date'}

2. Using update() Method:

   The update() method can add multiple elements to the set. You can pass a list, tuple, string, or another set to the update() method.

   fruits = {"apple", "banana", "cherry"}
   fruits.update(["elderberry", "fig", "grape"])
   print(fruits)  # Output: {'apple', 'banana', 'cherry', 'elderberry', 'fig', 'grape'}

3. Using update() with Different Iterables:

   The update() method can also accept other iterables like strings or sets.

   fruits = {"apple", "banana", "cherry"}
   fruits.update("date")  # Adds each character in "date"
   print(fruits)  # Output: {'apple', 'banana', 'cherry', 'd', 'a', 't', 'e'}
   
   fruits.update({"elderberry", "fig"})
   print(fruits)  # Output: {'apple', 'banana', 'cherry', 'elderberry', 'fig', 'd', 'a', 't', 'e'}