Page 94 - TP_Play_V2.1_class6
P. 94

INTRODUCTION TO


                    09                                                 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)



                   92       Play (Ver. 2.1)-VI
   89   90   91   92   93   94   95   96   97   98   99