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INTRODUCTION TO

              08                                                 PROGRAMMING PYTHON















                           Your Aim

                           to learn about:
                               l  Computer Languages           l  Language Translator
                                                                     Features of Python
                               l  Python                        l
                                l  Installing Python               l  Programming in Python
                                 l   Input and Output              l  Variables in Python
                                  l  Data Types                      l  Comments in Python
                                  l  Operators                         l  Precedence of Operators
                                   l  Some More Programs

            We have already learnt that computers follow certain steps to perform any task and when we
            perform a sequence of steps to solve any problem, it is called an algorithm. Let us now learn
            about computer languages used to develop programs.

                COMPUTER LANGUAGES
            To communicate with the computers, we need some special languages which are called computer
            languages or programming languages. A computer language is the medium by which instructions
            are transmitted to the computer to perform a specific task. It is a set of words, symbols and codes

            that the computer can understand. It is used to write computer programs. A computer program is
            a set of instructions written in a programming language. The process of writing a program is called
            programming. People who write the programs are called programmers.
            There are a number of programming languages worldwide. Some languages were developed
            for specific computers, others were developed for specific uses such as scientific or business
            applications. Computer languages are classified into two major categories:

                                             Computer Languages





                    Low-Level Language                                    High-Level Language




                 Machine           Assembly        Third Generation  Fourth-Generation             Natural
              Language (1GL)    Language (2GL)      Language (3GL)       Language (4GL)       Language (5GL)


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