input: Write a function to find the smallest number in a given list. The function should return the smallest number found in the list.
  def smallestNumber(nums):
      smallest = nums[0]
      for i in range(1, len(nums)):
          if nums[i] < smallest:
              smallest = nums[i]
      return smallest
  
  assert smallestNumber([4, 5, 6, 7, 8]) == 4
  assert smallestNumber([10, 2, 8, 4, 6]) == 2
  assert smallestNumber([3, 3, 3, 3]) == 3
  assert smallestNumber([-1, -2, -3, -4]) == -4
  assert smallestNumber([0]) == 0
output: def smallestNumber(nums):
      smallest = nums[0]
      for i in range(1, len(nums)):
          if nums[i] < smallest:
              smallest = nums[i]
      return smallest