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Glossary of Terms

Pitch

Corresponds to a frequency (in hertz) at which a sound will be played.

TONE

It is a LOGO statement used in some versions of LOGO. It allows the user to output a sound to the pc speaker. MSWLOGO uses the SOUND statement equivalent.

LOGO statements used in this document

Instruction

Shortcut

Description

SHOWTURTLE

ST

Shows the Turtle on the screen

HIDETURTLE

HT

Hides the Turtle from the screen

FORWARD number

FD

Moves the Turtle forward according to the number indicated

BACK number

BK

Moves the Turtle back according to the number indicated

RIGHT angle

RT

Changes the direction of the Turtle by turning it to the right

LEFT angle

 

LT

Changes the direction of the Turtle by turning it to the left

REPEAT times [ instruction(s) ]

 

Executes a set of instructions indefinitely

CLEARSCREEN

CS

Erase the picture before a new picture is drawn

HOME

 

 

Move the turtle back to the centre of the screen and repositions the turtle

SETXY xcor ycor

 

Moves the turtle to an absolute X,Y coordinate.

SQRT

 

Outputs the square root of the input, which must be nonnegative.

PERSPECTIVE

 

Allows logo to draw in 3 Dimension

RIGHTROLL angle

RR

Rolls the turtle on its right side the specified angle

LEFTROLL angle

LR

Rolls the turtle on its left side the specified angle

UPPITCH angle

UP

Pitches the turtle nose up by the specified angle

DOWNPITCH angle

DOWN

Pitches the turtle nose down by the specified angle

PENPAINT

PPT

Sets the pen's position to DOWN and mode to PAINT

PENUP

PU

Sets the pen's position to UP, without changing its mode.

 

PENERASE

PE

Sets the pen's position to DOWN and mode to ERASE.

 

WAIT time

 

Command that delays further execution for time 1/60ths of a second.

SETTURTLE turtle

Selects turtle turtle for control

WRAP

 

Tells the turtle to enter wrap mode: Used to end the PERSPECTIVE mode.

SETACTIVEAREA

 

Used for bitmap saving and printing. Represents the area which will be saved to an image file

MAKE varname value

 

Command that assigns the value value to the variable named varname,

POLYSTART

POLYSTART tells MSWLogo that you are about to define a polygo

POLYEND

POLYEND tells MSWLogo that you have completed the definition of a polygon

POLYVIEW

 

Views all polygons defined with POLYSTART and POLYEND

GIFSAVE

Saves a screen area to a gif file

TONE pitch duration

Plays a sound on the pc speaker

SOUND [pitch duration]

Plays a sound on the pc speaker

SOUNDON pitch

Plays a sound indefinitely until a SOUNDOFF statement is issued.

SOUNDOFF

Turns off a sound played with SOUNDON.

PLAYWAVE wavefile

Plays a wavefile.

 


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