#input（）函数的输入默认都是字符串，不可以比大小，使用int()内嵌就可以定义input的输入为数字

age =int(input('please input your age:' ))

# While循环的意思就是满足条件的在缩进内循环，不满足条件则跳出循环

# 循环及判断语句都以冒号作为结尾：

while age <=0 or age >150:

        print("please re-try,your age must more then ZERO and less than 150!!")

        age =int(input('please input your age:'))

print("Your age group is as below:")

if age >=18:

        print('Adult')

# elif就是 else if的缩写，如果不是，再继续做下一个条件的判断

elif age >=10:

        print('Teenager')

elif age >2:

        print('Kid')

else:

        print("Baby")