Skip to content
Related Articles

Related Articles

Improve Article

Intersection() function Python

  • Difficulty Level : Easy
  • Last Updated : 06 Feb, 2018

Intersection of two given sets is the largest set which contains all the elements that are common to both the sets. Intersection of two given sets A and B is a set which consists of all the elements which are common to both A and B.


Input: Let set A = {2, 4, 5, 6}
       and set B = {4, 6, 7, 8}
Output: {4,6} 
Explanation: Taking the common elements in both the sets,
             we get {4,6} as the intersection of both the sets.


set1.intersection(set2, set3, set4….)
In parameters, any number of sets can be given

Return value:

The intersection() function returns a set, which has the intersection of all sets(set1, set2, set3…) with set1.
It returns a copy of set1 only if no parameter is passed.

Below is the Python3 implementation of the above approach:

# Python3 program for intersection() function
set1 = {2, 4, 5, 6
set2 = {4, 6, 7, 8
set3 = {4,6,8}
# union of two sets
print("set1 intersection set2 : ", set1.intersection(set2))
# union of three sets
print("set1 intersection set2 intersection set3 :", set1.intersection(set2,set3))


set1 intersection set2 :  {4, 6}
set1 intersection set2 intersection set3 : {4, 6}

Practical applications:
In most of the probability problems, the concept of intersection of sets is needed.

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up
Recommended Articles
Page :