Python Class 11th CBSE

LIST (Class XI) • It is an ordered set of values enclosed in square brackets []. • Values in the list can be modified, i.e. it is mutable. • As it is set of values, we can use index in square brackets [] to identify a value belonging to it. • The values that make up a list are called its elements, and they can be of any type. . Its syntax is: Variable name [index] (variable name is name of the list). Let's look at some example of simple list: i) >>>L1 = [1, 2, 3, 4] # list of 4 integer elements. ii) >>>L2 = [“Delhi”, “Chennai”, “Mumbai”] #list of 3 string elements. iii) >>>L3 = [ ] # empty list i.e. list with no element iv) >>>L4 = [“ abc ”, 10, 20] # list with different types of elements v) >>>L5 = [1, 2, [6, 7, 8], 3] # A list containing another list known as nested list Creating and Accessing List • To create a list, put a number of expressions in square brackets. L=[] L=[value1, ...

                                     CYBER SAFETY Introduction-Cyber Safety :- Cyber safety is the safe and responsible use of Internet & ICT(Information & Communication Technology). Cyber safety is about to not only keeping information safe and secure, but also being responsible with that information, being respectful of other people online. As per Cyber safety peoples are advised to use good 'netiquette' (internet etiquettes). Safely Browsing the Web :- Viruses and malware spread, easily and quickly through websites/web browsing. Through clicking over the links found on web pages or in email mistakenly our computer may be infected. An infected computer can run slow, barrage us with pop-ups, download other programs without our permission, or allow our sensitive personal information to others.  Tips for Safe Web Browsing   Common sense- (never respond...