Python Set intersection() Method

The Python set intersection() method returns a new set containing elements that are common to both sets. It can also be written using the ampersand operator (&). The original sets remain unchanged.

The syntax of the intersection() method is:

set.intersection(set2)
# or
set1 & set2

Python set intersection() Parameters

The intersection() method takes one parameter:

• set2: Another set, or any iterable whose common elements will be found.

Here are examples demonstrating the intersection() method:

# Example 1: Basic intersection
set1 = {1, 2, 3, 4, 5}
set2 = {4, 5, 6, 7, 8}
result = set1.intersection(set2)
print(result)  # Output: {4, 5}

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

# Example 3: Multiple set intersection
set1 = {1, 2, 3, 4}
set2 = {2, 3, 4, 5}
set3 = {3, 4, 5, 6}
result = set1.intersection(set2, set3)
print(result)  # Output: {3, 4}

The intersection() method is useful when you need to find common elements between sets.