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1                         INTRODUCTION TO CODING












                         Learning Outcomes

                      Introduction                                            Traffic Light
                      Where else do we see Applications of Coding?            What Exactly is Coding?

                      What is a Programming Language?




                 INTRODUCTION
                 In your day to day life, you must have come across the term                                 Stop

                 'coding'. Have you wondered what it means. In this chapter,
                 you are going to learn what is coding and its usage in day to
                 day life.                                                                                  Wait


                 TRAFFIC LIGHT
                 While going to school, you must have seen a traffic light.
                                                                                                             Go
                 Traffic lights are devices that control the traffic through the
                 use of colours. These lights are placed at road intersections,
                 pedestrian crossing for smooth traffic flow.


                 How do traffic lights work?
                 In  traffic light, the lights cycle through  green (allows traffic to proceed in the direction

                 denoted), yellow (warns that the signal is about to change to red), and red (stops traffic
                 from proceeding) at regular intervals of time. Traffic lights help to prevent accidents and
                 congestion on the roads.

                                          Coding fact


                   John Peake Knight invented the first traffic light, after that  William Potts invented the
                   modern three-lens traffic light and Garrett Morgan invented the first automatic traffic light.



                 How do the traffic lights change automatically?
                 Traffic lights contain  sensors which  are programmed to calculate how  many cars or

                 pedestrians are present at a specific point.



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