python--while循环

1.最简单的while True循环

 count =
 while True :
     if count == :
         print('hello',count)
         break
     count += 

hello 

2.利用while循环写一个猜年龄程序：有3次机会，猜正确直接退出

 age=25
 count=0
 while count < 3:
     guess_age=input("age>>:")
     if guess_age.isdigit():
         guess_age=int(guess_age)
     else:
         print('请输入数字')
         continue
     if guess_age > 25:
         print("往小猜")
     elif guess_age < 25:
         print("往大猜")
     else:
         print("猜对了")
         break
     count += 1
     if count == 3:
         print('\n3次机会已用完')

 age>>:df
 请输入数字
 age>>:1
 往大猜
 age>>:67
 往小猜
 age>>:25
 猜对了