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Scope of a variable

                 While creating a variable, you should also remember the limits of its usage. For example,
                 the boxes that your mother named, can be used in the kitchen and rarely outside of the
                 kitchen. Similarly, a variable can also be used in specific areas of a code, known as scope of
                 a variable.

                 The scope or accessibility of the variables defined in a program depends where you have

                 declared it in each program. Variable defined outside the scope cannot be accessed.

                 NAMING VARIABLES
                 Every variable in a program is unique and you need to allocate

                 variable a unique name. You cannot use the same name of a
                 variable more than once.

                 Variable name acts as an  identifier  for that variable and
                 suggest the information which it contains.

                                          Coding fact


                   In Covid-19  pandemic time, Avi Schiffmann,  a teenager,  coded one of the most visited
                   website across the globe ' ncov2019.live', to monitor COVID-19.






                   Example: If variable 'x' stores value 3, variable 'y' stores value 3. When         Subject Enrichment
                   we perform addition operation on 'x' and 'y', we will get the output as '6'.


                 Note: Variable is created, when you assign a value to it.

                 Rules for naming a variable in python:
                    Name your variables in such a way that it describes its purpose.
                    Variable name must begin with a letter or an underscore and can range from 1 to 255 characters.

                    No special character or spaces are allowed.
                    Uppercase and lowercase characters are distinct.
                    Keywords (reserved words) cannot be used as a variable.


                                          Coding fact


                   Co-founders of Apple, Steve Jobs and Steve Wozniak, in their teenage began their coding
                   careers.







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