WAP in which you have to find the missing number in an array of 1-100?

Answer 1

# if you have list a = [1, 2, ... 100] then:
if x in set(a):
print('yes') # x in 1-100
else:
print('no') # x there isn't n 1-100

Answer 2

array? There is list, set, dict, tuple in Python. No array.

Answer 3

# given: list A is the array with the missing number
missing _ number = sum(range(101))-sum(A)

this works if there is only one missing number. see my code as example.