最贊回答 / _____然
if 判斷語句 可解釋為如果x % 2 取余數 例如 5 % 2 等于 1x / 2 取商 例如 5 / 2 等于 2一般判斷是否為奇偶數用x % 2因為偶數除以2不會有余數 奇數除以2總會余1
2019-08-05
已采納回答 / 慕名而來lj
<...code...>while True:? ? if n > 20:? ? ? ? break這里就是取前20項的和,到第21項就退出?sum = sum + x這里就是每一項相加求和了? ? x = x * 2根據題意1,2,4,8,16.....都是二倍關系,因此賦值x = x * 2? ? n = n +?1這里就是從第一項到第二十項了
2019-08-04
最新回答 / weixin_慕碼人9112255
s = 'Python was started in 1989 by "Guido".\nPython is free and easy to learn.'ORs = '''Python was started in 1989 by "Guido".Python is free and easy to learn.'''
2019-08-04
