Skip to content
Related Articles

Related Articles

Improve Article
Python – Consecutive Missing elements Sum
  • Last Updated : 23 Jan, 2020

Sometimes, we can get elements in range as input but some values are missing in otherwise consecutive range. We might have a use case in which we need to get summation of all the missing elements. Let’s discuss certain ways in which this can be done.

Method #1 : Using list comprehension + sum()
We can perform the task of finding missing elements using the the range function to get the maximum element fill and then insert the elements if there is a miss. The summation is performed using sum().




# Python3 code to demonstrate
# Consecutive Missing elements Sum
# using list comprehension + sum()
  
# initializing list
test_list = [3, 5, 6, 8, 10]
  
# printing original list
print("The original list : " + str(test_list))
  
# using list comprehension + sum()
# Consecutive Missing elements Sum
res = sum([ele for ele in range(max(test_list) + 1) if ele not in test_list])
  
# print result
print("The sum of missing elements : " + str(res))
Output :
The original list : [3, 5, 6, 8, 10]
The sum of missing elements : 23

 

Method #2 : Using set() + sum()
This problem can also be performed using the properties of difference of set and then getting the elements that are missing in a range. The summation is performed using sum().






# Python3 code to demonstrate
# Consecutive Missing elements Sum
# Using set() + sum()
  
# initializing list
test_list = [3, 5, 6, 8, 10]
  
# printing original list
print("The original list : " + str(test_list))
  
# Using set() + sum()
# Consecutive Missing elements Sum
res = sum(list(set(range(max(test_list) + 1)) - set(test_list)))
  
# print result
print("The sum of missing elements : " + str(res))
Output :
The original list : [3, 5, 6, 8, 10]
The sum of missing elements : 23

 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 :