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    On the output screen, a = 20 and b = 40 will be printed. You can also assign the same value to
                     multiple variables at the 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, grade="Deepak", 12, ‘VII’

                       print ("Name is", name)

                       print ("Age is", age)

                       print ("Grade is", grade)
                     On the output screen, Name is Deepak, Age is 12 and Grade is VII will be printed.

                     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.

                            DATA TYPES

                     Data types are used to define the type of value a data can contain. Each variable in Python is
                     associated with some data type. Each data type requires a different amount of memory and has some

                     specific operations performed on it.
                     Data types are divided into four categories as shown below:

                                                                        Data Types

                                       Numbers        Dictionary         Sets           Sequence          Boolean

                           Integer/long             Float                      String                 List

                                       Complex                                            Tuple

                                                                                                 Introduction to Python  77

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