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 listtest_list = [3, 5, 6, 8, 10] # printing original listprint("The original list : " + str(test_list)) # using list comprehension + sum()# Consecutive Missing elements Sumres = sum([ele for ele in range(max(test_list) + 1) if ele not in test_list]) # print resultprint("The sum of missing elements : " + str(res)) |
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 listtest_list = [3, 5, 6, 8, 10] # printing original listprint("The original list : " + str(test_list)) # Using set() + sum()# Consecutive Missing elements Sumres = sum(list(set(range(max(test_list) + 1)) - set(test_list))) # print resultprint("The sum of missing elements : " + str(res)) |
The original list : [3, 5, 6, 8, 10] The sum of missing elements : 23
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