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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 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, 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
                  A data type specifies the type of value a variable can contains. For example, a person’s name must

                  be stored as a string value whereas the person’s age must be stored as an integer. Data types in
                  Python are:
                      ✶    int:  Positive or negative whole numbers (without any fractions). Example: a = 3
                      ✶    float: Any real number in which a fraction is denoted by a decimal symbol. Example: a = 3.5
                      ✶    string: A string value is a collection of one or more characters put in single or double

                        quotes. Example: a="hello"

                      COMMENTS IN PYTHON

                  Comments in Python can be used to explain parts of the code. It can also be used to hide the
                  code as well. Comments enable you to understand the way a program works. In python, any
                  statement starting with # symbol is known as a comment. Python does not execute comments.
                  Comments are not a part of the program, but they do enhance the interactivity of the program
                  and  make  it  readable.  Python  supports  two  types  of  comments:  Single  line  comment  and
                  Multiline comment.







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