誰能告訴我這個(gè)index是干嗎用的？
def?sub_sum(L):
????index?=?0
????sum1?=?0
????sum2?=?0
????for?item?in?L:
????????if?index?%?2?==?0:
????????????sum1?+=?item
????????else:
????????????sum2?+=?item
????????index?+=?1
????return?sum1,?sum2
L?=?[1,?2,?3,?4,?5,?6,?7,?8,?9,?10]
result?=?sub_sum(L)
print('奇數(shù)項(xiàng)的和?=?{}'.format(result[0]))
print('偶數(shù)項(xiàng)的和?=?{}'.format(result[1]))
2021-04-12
用來判斷l(xiāng)ist每一項(xiàng)是奇數(shù)項(xiàng)還是偶數(shù)項(xiàng)的，index%2如果等于0，那就是偶數(shù)項(xiàng)，如果不等于0，那就是奇數(shù)項(xiàng)