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    Tick ( ) if you know this.

                           ▶  Python is an interpreted language that executes code line by line.
                           ▶  The Python Shell window executes one command at a time.

                                VARIABLES IN PYTHON

                      A Variable is the name of the memory location that is used to store data values that can be
                      accessed or changed later. The names given to the variables are known as identifiers. In Python,
                      we do not need to specify the type of variable because Python is a dynamic language and it also
                      identifies the variable type automatically.

                      DECLARING AND INITIALISING A VARIABLE
                      In Python, variables are declared and initialised at the same time in the following way:

                      a = 10
                      b = 20
                      print ("+a=", a)
                      print ("b=", b)
                      On the output screen, a = 10 and b = 20 will be printed. You can also assign the same value
                      to multiple variables at the same time in the following way:

                      a = b = 20
                      print ("a=", a)
                      print ("b=", b)
                      On the output screen, a = 20 and b = 20 will be printed.
                      You can also assign multiple values to multiple variables in the same line in the following way:

                      name, age, Class= "Anaya", 12, 'VII'
                      print ("Name is", name)
                      print ("Age is", age)
                      print ("Grade is", Class)
                      On the output screen, Name is Anaya, Age is 12 and Grade is VII will be printed in
                      three lines.

                      You must follow the given rules while creating and naming the variables:
                         A variable name must start with a letter or underscore character.
                         A variable name cannot start with a number.
                          A variable name can only contain alphanumeric characters (all the letters of the alphabet and
                        numbers) and underscores (_).
                         Variable names are case-sensitive.

                         Variable names cannot contain any special character or symbol.

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