Smallest Missing Number in Python

Problem Statement:

In the smallest missing number in Python, we are given a list of numbers, and we need to find the smallest missing number using the Python program. For example, [1, 2, 3, 3, 5, 7, 7, 4, 4, 9, 8]=>sorting=>[1, 2, 3, 3, 4, 4, 5, 7, 7, 8, 9], 6 is the smallest missing number.

Code for Smallest Missing Number in Python:

numbers = [1, 2, 3, 3, 5, 7, 7, 4, 4, 9, 8]
numbers.sort() # [1, 2, 3, 3, 4, 4, 5, 7, 7, 8, 9]
previous = 1
current_should_be = 1
i = -1
while True:
    if i>=0:
        previous=numbers[i]
    i += 1
    current = numbers[i]
    if current == previous or current == current_should_be:
        previous = current
        current_should_be = current + 1
        continue
    else:
        print(previous+1)
        break

Output:

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