continue and break

 dead loop   死循环 有时候当条件满足时会无限制的不停循环执行所缩进的条件

break    完全结束一个循环.跳出循环执行后面的语句

continue  结束本次循环 接着还是执行后面的循环

练习

1

age = 25
count = 0
while count < 3 :
     guess_age = int(input("please:"))
     if guess_age > age :
          print("太大了!")
     elif guess_age < age:
          print("太小了!")
     else:
          print("Yes!")
          break
     count += 1

2

#升级版
age = 25
count = 0
while count < 3:
     guess_age = int(input("please:"))
     if guess_age > age:
          print("太大了!")
     elif guess_age < age:
          print("太小了!")
     else:
          print("Yes!")
          break
     count += 1
     if count == 3:
          choice = input("again?")
          if choice == "Y" or choice == "y" :
              count = 0