The document introduces some basic LOGO commands for controlling a turtle in MSWLogo, including commands to move the turtle forward or backward, turn it left or right by degrees, clear the screen, hide or show the turtle, lift or lower the pen, return the turtle to its starting point, and repeat commands a specified number of times. It provides a table listing common commands like FORWARD, BACK, LEFT, RIGHT, CLEARSCREEN, and their descriptions.

1. I C T Y E A R 5I C T Y E A R 5
Basic LOGO Commands
UNIT 3 : PROGRAMMING IN LOGO

2. Basic LOGO CommandsBasic LOGO Commands
In MSWLogo, the turtle is represented by a triangle. At the start, it
always point towards the top of the screen, but you can make it turn
in any direction.
RT 90LT 90
Left 180 or Right 180
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3. Basic LOGO CommandsBasic LOGO Commands
Each Logo command instructs the turtle to do certain tasks. The table
below shows some of the basic commands you will use most often.
Command Shortcut Description
FORWARD
number
FD
number
Moves the turtle forward by a
number of spaces
BACK number BK
number
Moves the turtle backwards by a
number of spaces
LEFT angle LT angle Turns the turtle to the left by a
number of degrees.
RIGHT angle RT angle Turns the turtle to the right by
number of degrees.
CLEARSCREEN CS Clears the screen
HIDETURTLE HT Hides the turtle from the screen
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4. Basic LOGO CommandsBasic LOGO Commands
Command Shortcut Description
SHOWTURTLE ST Shows the turtle on the screen
PENUP PU Does not draw as it moves
PENDOWN PD Draws as it moves
HOME HOME Returns the turtle to the starting
point.
REPEAT number REPEAT
number
Repeats the command a certain
number of times
Example of command:
FORWARD 100
BK 50
RIGHT 50
LT 70
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