Boolean and None Type in Python

As you know about boolean in other programming language. it is same in python too but with small differences .boolean can be a true or false value.can be declared as either of them. eg: python_course = True java_course = False Simply type a name and assign a value "True" or False . if you have noticed only difference with other programming language is that it starts with Capital letter T for True and Capital letter F for False .interestingly you can convert Boolean value to int and it will give you values 1 and 0 in case of True and False like below. eg: int(python_course) == 1 int (java_course) == 0 str(python_course) == "True" And for string it will simply give textual representation "True" or "False". Now coming to None: it is similar to null like other programming languages. eg: aliens_found = None I find it useful as a place holder variable.Something that I will use later.However there is difference between variable you have defined None and other the variable not defined at all. Simply type k in idle and idle will tell you that k has not been defined but if I assign None to k then it will not give any result but normal for None and also it will not cause any error to show either.So None is called None type.