# ---------------------------
    # 《Python实例教程》
    __author__ = 'stormsha'
    __date__ = '2019/4/10 14:21'
    # ---------------------------'
    """
    认识 Python 变量，体验无需定义类型的 Python 变量
    认识 Python 输入语句，输入的内容是字符串类型 | <class 'str'> 
    """
    a = 10
    b = 20
    c = input("请随意输入一个数字：")

    print("变量a的类型：", type(a), "Value of a = ", a)
    print("变量b的类型：", type(b), "Value of b = ", b)
    print("变量b的类型：", type(a+b), "Value of a+b = ", a+b)
    print("变量c的类型：", type(c), "Value of c = ", c)