Python Set union() Method

The Python set union() method returns a new set containing all unique elements from all sets. It can also be written using the

operator.

The syntax of the union() method is:

set.union(set2, set3, ...)
# or
set1 | set2 | set3

Python set union() Parameters

The union() method takes one or more parameters:

• set2, set3, …: Other sets or iterables to combine with the original set.

Here are examples demonstrating the union() method:

# Example 1: Basic union
set1 = {1, 2, 3}
set2 = {3, 4, 5}
result = set1.union(set2)
print(result)  # Output: {1, 2, 3, 4, 5}

# Example 2: Using operator syntax
numbers1 = {1, 2}
numbers2 = {3, 4}
numbers3 = {5, 6}
result = numbers1 | numbers2 | numbers3
print(result)  # Output: {1, 2, 3, 4, 5, 6}

# Example 3: Union with different iterables
set1 = {1, 2, 3}
list1 = [3, 4, 5]
tuple1 = (5, 6, 7)
result = set1.union(list1, tuple1)
print(result)  # Output: {1, 2, 3, 4, 5, 6, 7}

The union() method is useful for combining multiple sets into one.