# while 循环

 age = 56count = 0

 while count < 3 :

     guess_age=int(input('输入年龄：'))

     if guess_age == age:

         print('猜到了')

         break

     elif guess_age > age:

         print('猜大了')

     else:

         print('猜小了')

     count +=1

     if count==3:

         shuru=input('还玩吗（Y/N）')

         if shuru != 'n':

             count =0

 else:

     print('以输入3次，告辞') '''

 #从0开始循环，最大到10，步数是2

 for i in range(0,10,2):

     print(i)

 for i in range(10):

     print('---',i)

     for j in range(10):

         print(j)

         if j >5:

             break

 学习无止境，加油