python//新手上路005//20200103

Jan.3th,2020

#迭代求和
def list_sum(num_list):
  the_sum = 0
  for i in num_list:
    the_sum = the_sum + i
  return the_sum
print(list_sum([1, 3, 5, 7, 9]))

def list_sum(num_list):
  if len(num_list) == 1:
    return num_list[0]
  else:
    return num_list[0] + list_sum(num_list[1:])
print(list_sum([1, 3, 5, 7, 9]))