Page 2 : Main Menu, Title Bar, Control, MSWLogo Screen, Buttons, File Bamap Set Zoom Help, Main or Graphic, Screen, A Turtle, Horizontal, Scroll Bar, Vertical, Scroll Bar, Commander, Commander, Window, Control, Buttons, Halt, Trace, Pause, Status, Recall List Box, Step, Reset, Execute Edall, Input Box, Main Screen, Main Screen is the blank space in the middle of the LOGO window. It is the, area where you can draw pictures. It is also knownasthe Graphics screen., Commander Window, This is the smaller area under the Main Screen, used for typing, commands. We can run the commands by pressing the Enter key., Commander window is divided into two sections:, 1. Command Input Box:The white bar where you type the commands, is known as Command Input box. You can execute the commands by, pressing the Enter key or by clicking the Execute button., 2. Recall List Box : It is the gray section that displays the list of all, commands that are executed. It also displays messages, which appear as a, result of these commands. It keeps a recordof instructionsyoutypeinto the, Input Box., Introduction to MSWLogo, 59, 2

Page 3 : o Turtle, A turtle looks like a small triangle. It has two parts- head, and tail., Head, Head:The pointed top of the turtle is the head. The logo commands, FACT, are known as, BOX, Tail:The flat bottom part of the turtle is the tail., Primitives., LOGO PRIMITIVES, When you start MSWLogo, the turtle is at the Home position. You can use, simple primitives to move the turtle around on the screen. When the, turtle moves, it draws a line in the direction it moves. We can type, primitives in capital letters or small letters. A turtle can move in all the, four directions., Forward, Backward, Right, Left, Forward Primitive, The forward primitive makes the turtle move ahead in the direction that, it is pointing towards. You need to type the number of steps to move the, turtle. The short form of FORWARDIS FD., E MSWLogo Screen, Fie Bitmap Set Zoom Help, Example: We need to do FD 80., Step-1 : Type Forward or FD., Step-2 : Press spacebar key., Step-3 : Type 80., Step-4 : Press the Enter key., This will move the turtle 80 steps forward drawing a line behind it., 60, Introduction to MSWLogo, 3

Page 4 : Backward Primitive, The backward primitive makes the turtle move backwards. You need to, type the number of steps to move the turtle. The short form of Backward, is BK., Example: We need to do BK 50., Step-1 : Type BACK or BK., Step-2 : Press spacebar key., Step-3 : Type 50., Step-4 : Press the Enter key., This will move the turtle 50 steps backward drawing a line behind., Note:, If we do not leave a space between the command and the number of, steps to be moved, an error message appears., Example : If we give the command as, E Commender, FD75, I dan't knov hov to FD75, Halt, Trace, Pause, Status, FD75 an error message 'l don't know, how to FD75 "gets displayed in the, Step, Reset, commander window., Execute, Edall, Home Primitive, The Home primitive brings the turtle to its home position, i.e., in the, center of the Graphics screen. The turtle draws a line as it moves to the, center of the main screen., Introduction to MSWLogo, 61, 4

Page 5 : 口, MSWLogo Screen, MWoge Sowen, File ZomIN, E Commander, E Commander, HOME, FD 100, BK 40, Halt, Trace, Holt, Trace, Pause, Status, Paute, Status, Step, Reset, Step, Reset, FD 100, Execute, Edall, Execute, Edal, Right Primitive, The right primitive is used to turn the head of the turtle towards the right, side, i.e., in the clockwise direction. The short form of right primitive is RT., Example: Weneed to turn 90° right., Logo was designed by, Seymour Papert in 1967., MSWLogo was developed oo, by George Mills in USA., Step-1 :Type Right or RT., FACT, BOX, Step-2 : Press spacebar key., Step-3 : Type 90 (here 90 is the, E MSWLogo Screen, angle)., File Bitnap Set Zoom Help, Step-4 : Press the Enter key., 62, Introduction to MSWLogo, 一