input: from typing import List
  
  
  def add_numbers(numbers: List[int]) -> int:
      """ Adds all the numbers in a given list and returns the result.
      >>> add_numbers([1, 2, 3])
      6
      >>> add_numbers([0, 0, 0])
      0
      """
output:     total = 0
      for number in numbers:
          total += number
      return total