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6                                               BASICS OF PYTHON

                                                                             PROGRAMMING











          Chapter Outline


          6.1 Character Set                                  6.2 Tokens
          6.3 Variables                                      6.4 Functions
          6.5 Comments                                       6.6 Input and Output





        Introduction


        In the previous chapter, we introduced Python - a popular high-level programming language that is simple to learn.
        In this book, we will use Python to give instructions to the computer to input data, process it, and output the results
        in the desired format. A sequence of such instructions forms a program. This chapter will talk about the basics of the
        Python programming language, such as the character set, tokens, variables, comments, and input-output statements.

        6.1 Character Set

        A character set for a computer programming language is a set of characters available to a programmer for use. Typically,
        it consists of lowercase and uppercase alphabets, digits, symbols such as + - * /, [] and white space characters like
        blank, end of the line, and tab. Table 6.1 shows the set of characters popularly used in Python.

                                               Table 6.1: Character Set of Python
                             Letters             a-z, A-Z
                             Digits              0-9
                             Special symbols     ~ ! @ # $ % ^ & * () _ + = - {} []

                                                 | \ : " ; ' < > ? , . /
                             White Spaces        Blank  space , Tab  (\t), Carriage return  (),
                                                 newline(\n)




               Python supports the Unicode encoding standard, which includes all ASCII characters.








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