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Symbols Used in Flowcharts


            Different symbols are used to draw different types of flowcharts.

                Symbol              Name                                  Description
                                                  It is  used to show the start and stop points of the
                               (Start/Stop)
                  Oval                            flowchart. It usually contains the words 'Start' or 'Stop'.

                               Process            It shows a process or action step.
               Rectangle
                                                  It represents information entering  or leaving the
                               Input/Output
             Parallelogram                        system, i.e., input and output.

                               Decision           It indicates a question or branch in the process flow. It


                Diamond                           is used when there are 2 options (Yes/No).
                               Flow Line          It shows the direction in which the process flows.


            Example to calculate simple interest.
                                                            Start


                                                     Read P for Principal
                                                          r for rate
                                                          t for time                                                     Computational Thinking


                                                          Calculate
                                                      SI = (P * r * t)/100


                                                           Print SI


                                                            Stop


            A.  Complete the algorithm to search on Google for a
               question “who developed first code?”

                Step 1:  Start

                Step 2:   Start your computer
                Step 3:  Open a
                Step 4:  In the address bar, type                        .com

                Step 5:  Type                       as your query

                Step 6:  Press
                Step 7:  End

            B.  Write an algorithm and draw a flowchart to add first 100 natural numbers.


                                                               The CT Corner! (Algorithmic Intelligence)     79
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