Page 69 - 2403_Trackpad_V5.1_C6_Fb
P. 69

RULES TO DRAW FLOWCHART
                 You must follow these basic rules while drawing a flowchart:

                   The flowchart should be clear, neat and easy to follow.
                   Maintain the direction of the flow from left to right or from top to bottom.
                   Only one flow line should come out of a process symbol.

                    Ensure that only one flow line should enter a decision symbol, but two flow lines should leave the
                   decision box.
                   Ensure that the flowchart has a logical start and end.

                 ADVANTAGES OF A FLOWCHART

                 Flowcharts provide the following advantages:
                   Programmers can analyse the problem in detail.
                   Programmers can easily understand the logic.

                   Ideas and solutions can be communicated easily and clearly.
                   Once the flowchart is prepared, the coding becomes easy for the programmer.



                            DRAWING A FLOWCHART

                 Let us now learn how to draw a flowchart.

                 MAKING A CUP OF TEA                                    CALCULATING THE AREA OF A CIRCLE


                                     Start                                                 Start



                            Read Kettle, Teabags,                                    Read r (radius)
                         water, milk, sugar and cup


                          Boil the water in the kettle                                  Calculate
                                                                                     Area = 3.14 × r × r

                     Pour the boiling water into the cup

                                                                                        Print Area
                          Add milk, sugar and put a
                              teabag in the cup
                                                                                           Stop

                                 Stir the tea



                                Tea is ready



                                     Stop




                                                                                             Algorithm & Flowchart  67
   64   65   66   67   68   69   70   71   72   73   74