input: 
  def sum_nums(nums):
      total = 0
      for num in nums:
          total += num
      return total
  
  lst = [1, 5, 9, 0, 2, 4, 7, 8, 6, 10, 3, 11, 12, 13, 14]
  total = sum_nums(lst)
  print(total)
  
output:     total = 0
      for num in nums:
          total += num
      return total