def 函数名():

    代码语句

    --------

    --------

　　return 参数1,（参数2等）------------------用逗号隔开即可

# def hcf(x, y):

#    #该函数返回两个数的最大公约数

#    # 获取最小值

#    if x > y:

#        smaller = y

#    else:

#        smaller = x

#    for i in range(1,smaller + 1):

#        if((x % i == 0) and (y % i == 0)):

#            vans = i

#    return vans

# # 用户输入两个数字

# while 1:

#     num1 = int(input("输入第一个数字: "))

#     num2 = int(input("输入第二个数字: "))

#     print( num1,"和", num2,"的最大公约数为", hcf(num1, num2))

#     print( num1,"和", num2,"的最小公约数为",int(num1*num2/hcf(num1, num2)))

score=input("")

try:#尝试执行正常语句，有异常则在except处显示

    score=eval(score)

    if 0<=score<=100:

        print(score,'is right.')

    elif score not in range(0,100):

        print(score,'is not specific range!')

    else:

        raise NameError#判断是否为数字

except NameError as err:

    print(err,'is not Number!')

else:

    print("success!")

finally:

    print("done")#无论异常与否都会执行