How to display last missing element in an array that didn't exist in array-CodePudding

Original array: 10 11 12 13 14 15 16 17 18 19 Missing number in the array (10-20): 20.

arr = [10,11,12,13,14,15,16,17,18,19]
missing_elements = []
for ele in range(arr[0], arr[-1] 1):
    if ele not in arr:
        missing_elements.reverse(ele)
print(missing_elements)

i tried this many things but didn't get the answer its showing me empty array...!!

CodePudding user response：

Your range doesn't include 20, so as-is, your output will be empty even if you fix the missing_elements.append part.

Replace

missing_elements.reverse(ele)

with

missing_elements.append(ele)

and then

print(missing_elements[-1])

CodePudding user response：

I would try this:

arr = [10,11,12,13,14,15,16,17,18,19]
for ele in range(arr[0], arr[-1] 1):
    if ele not in arr:
        arr.append(ele)
print(arr[-1])

It adds the missing element then prints it out