input: 
  from typing import List
  
  
  def smallest_number(numbers: List[int]) -> int:
      """Find the smallest number in the given list.
      >>> smallest_number([4, 5, 6, 7, 8])
      4
      >>> smallest_number([10, 2, 3, 4, 5])
      2
      """
      smallest = numbers[0]
      for number in numbers[1:]:
          if number < smallest:
              smallest = number
      return smallest
  
output:     smallest = numbers[0]
      for number in numbers[1:]:
          if number < smallest:
              smallest = number
      return smallest