python基础,if语句,while循环

if语句:

①2选一                                              ④多选一

if:     条件                                              if:

else:    否则                                          elif:

②多选一                                             elif:

if:条件                                                   else:

elif:                                                        ⑤if嵌套

elif:                                                        if:

elif:                                                                  if:

③多选多

if:

if:

if:

if:格式化输入,% 占位符,如果内容中只想输出%号,需要加两个%号

input('提示语,学习进度% %(学习进度,10)

while 1:

else:

break,终止当前循环,countinue,跳出本次循环,继续下一次循环

while true:

while ture:

break(这里的break只能终止一个循环)