Page 1 - Class 4 Computer Synopsis (LOGO Procedure)
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BIRLA DIVYA JYOTI                                 Class and Sec:
                                        Subject: Computer Ch: 10 Internet
                                          Synopsis and Worksheet 1 Of 1                           __IV/___

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         1.  In LOGO, a procedure is a set of commands given to perform a particular task.
         2.  Each procedure is assigned a particular name.

         3.  It can be executed by typing the assigned name in the command input box.
         4.  A procedure is divided into 3 parts:
            a) TITLE LINE: It allows you to give a name to the procedure. It always starts with the word To.

            b) BODY: It contains all the primitives for drawing a desired figure. (The Commands)
            c) END LINE: It  contains the  word,  'End', which conveys to the computer that primitives  in the
            procedure are over.


     CREATING A PROCEDURE:
     1. Click in the command input box and type TO followed by the procedure name. (it can be any name) and
     press enter key

     2. Another box known as TO MODE input box will appear. Where we have to enter primitives one by one and
     press enter after every primitive.
     3. When all the primitives have been entered type END and press the enter key. A message saying <Procedure
     name> defined.

     4.  Your  procedure  is  ready  now  just  type  the  procedure  name  and  press  enter  and  the  turtle  will  draw
     according to the procedures given.


            For example, to make a square we have to enter the following primitives
                    FD 100
                    RT 90
                    FD 100

                    RT 90
                    FD 100
                    RT 90

                    FD 100
                    RT 90

     So, we will make a procedure called SQUARE

     In the command input box, we will write:
            TO SQUARE and press enter key.
     Then we will get the TO MODE BOX where we will write the 1  Primitive and then press ENTER key
                                                                    st
            FD 100 (Press enter) the text in the box will disappear when you will press enter then we have to
     give the next primitive i.e. RT 90 (Press enter) the text in the box will again disappear when you will press
     enter then we have to give the next primitive i.e. FD 100 and then press enter till all the primitives has been
     given. After giving all the primitives we have to give the command END, this will inform the LOGO that all

     the commands have been given and then the TO MODE box will disappear too. Now just type SQUARE in the
     command input box the logo will draw a square.
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