- "name" is already in use. Try a different name.
- "name" is not a Logo name.
- "name" is not a Logo procedure.
- "name" needs a list as its second input.
- "name" needs more input(s).
- "value" is not a valid input for "variable".
- (greater than)
- (greater than or equal to)
- (less than)
- (less than or equal to)
- * (multiplication)
- + (addition)
- - (minus)
- .FREEDC
- .GETDC
- .HINST
- .HWND
- .MESSAGE
- .MOUSEON
- .READ
- .SEEK
- .TURTLEPOINT
- .WINDOWPOINT
- .WINDOWS
- .WNDPROC
- .WRITE
- / (division)
- = (equals)
- A
- ABS
- AGET
- ALL
- AND
- APPLY
- ARCTAN
- ASCII
- ASET
- ASK
- Aa
- Accessing DLLs
- Activity:one year old
- Ambiguous filename not allowed.
- Attempt to draw a dot outside the screen.
- Attempt to move turtle nnn outside the fence.
- B
- BACK
- BACKGROUND
- BACKGROUND (BG)
- BACK (BK)
- BASE
- BF
- BG
- BGPATTERN
- BK
- BL
- BM
- BREAK
- BURIEDNAMES
- BURIEDPROCS
- BURIEDPROPS
- BURY
- BURYALL
- BURYNAME
- BURYPROC
- BURYPROP
- BUTFIRST
- BUTFIRST (BF)
- BUTLAST
- BUTLAST (BL)
- BUTMEMBER
- BUTMEMBER (BM)
- BUTTON?
- BYE
- BYTEARRAY?
- Bad number syntax.
- Button Bar
- CASE
- CASE?
- CATCH
- CHAR
- CLEAN
- CLEARINPUT
- CLEARSCREEN
- CLEARSCREEN (CS)
- CLEARTEXT
- CLEARTEXT (CT)
- CLOSE
- CO
- COLOR
- CONST
- CONSTANTS
- CONTENTS
- CONTINUE
- CONTINUE (CO)
- COPYDEF
- COPYOFF
- COPYON
- COS
- COUNT
- CREATE
- CS
- CT
- CURDIR
- Can't find catch for "symbol".
- Cannot access the clipboard.
- Cannot allocate requested amount of memory.
- Cannot initialize properly.
- Cannot print window contents.
- Cannot start timer.
- Cannot tell turtle n; there are only x turtles defined.
- Color
- Colors
- Commands
- Coordinate System
- Customizing Your Logo Environment
- DATE
- DEFEVENT
- DEFINE
- DEFINED?
- DELETE
- DELIMITER
- DIR
- DIRECTORY
- DIRECTORY (DIR)
- DISK
- DLLs
- DOT
- DOTCOLOR
- DRAW
- Debugging
- Defining Events
- Division by zero.
- EACH
- EDIT
- EDN
- ELSE
- EMPTY?
- END
- EOF
- EQUAL?
- ER
- ERASE
- ERASE (ER)
- ERC
- ERN
- ERROR
- EVAL
- EVENT
- EXIT
- EXPN
- EXTENT
- Editing
- Ending PC Logo
- Entering Commands
- Error: Bad number syntax.
- Error code AFN
- Error code ATOM
- Error code CLIP
- Error code CTCH
- Error code DIV0
- Error code DOT
- Error code FILE
- Error code HASH
- Error code INP
- Error code INT
- Error code IO
- Error code LIST
- Error code MATH
- Error code MCI
- Error code MEM
- Error code MORE
- Error code MOVE
- Error code NAME
- Error code OPEN
- Error code OUT
- Error code PCX
- Error code PRN
- Error code PROC
- Error code RDY
- Error code STCK
- Error code STRU
- Error code TELL
- Error code TICK
- Error code USED
- Error code VAL
- Error code VER
- Error code WIN
- Error codes
- Exiting
- FALSE
- FATAL ERROR: Garbage collection failed
- FATAL ERROR: Garbage collection failed.
- FATAL ERROR: Unable to obtain Decive Context
- FATAL ERROR: Unable to obtain device context.
- FD
- FENCE
- FILE.INFO
- FILE?
- FILL
- FILLARRAY
- FIRST
- FKEY
- FKEY.n
- FM
- FONT
- FONTS
- FOR
- FORWARD
- FORWARD (FD)
- FPUT
- FROMMEMBER
- FROMMEMBER (FM)
- FS
- FULLSCREEN
- FULLSCREEN (FS)
- File "name" is too large to fit into buffer.
- File "name" not found.
- File stream nnnn not open.
- Files
- Flow Control
- Fundamentals
- GETATTR
- GETBYTE
- GETBYTE.NO.ECHO
- GETMODE
- GETPALLET
- GETXY
- GO
- GPROP
- HALT
- HEADING
- HELP
- HIDETURTLE
- HIDETURTLE (HT)
- HOME
- HT
- IBASE
- IF
- IFF
- IFFALSE
- IFFALSE (IFF)
- IFFALSE IFF
- IFT
- IFTRUE
- IFTRUE (IFT)
- IFTRUE IFT
- IGNORE
- INT
- ITEM
- Input/output (I/O) error.
- Inputs
- Inputs and Outputs
- Inputs to Procedures
- Interaction
- Internal error: "text"
- KEY?
- Keyboard
- LABEL
- LAST
- LAUNCH
- LEFT
- LEFT (LT)
- LIST
- LIST?
- LOAD
- LOADPIC
- LOADSNAP
- LOCAL
- LOG
- LOG10
- LOGAND
- LOGNOT
- LOGO.INI
- LOGOR
- LOGXOR
- LPUT
- LSH
- LT
- Language syntax
- Leaving PC Logo
- List of error messages
- Lists
- Logo Data
- Logo Fundamentals
- Logo Language Syntax
- Logo data
- Logo environment
- MAKE
- MCI
- MCI?
- MCI error.
- MCI error: "text"
- MEMBER?
- MOUSE
- MOUSESHAPE
- Main Page
- Math overflow.
- Memory
- Memory management
- Menus
- Multitasking
- NAME
- NAME?
- NAMES
- NOCASE
- NODES
- NOT
- NUMBER?
- Names
- No more file structures for OPEN or CREATE.
- No printer defined.
- Numbers
- OP
- OPEN
- OR
- ORIGIN
- OUTPUT
- OUTPUT (OP)
- Objects
- Out of atom space.
- Out of memory.
- PATTERN
- PAUSE
- PC
- PC Logo Wiki
- PD
- PE
- PEEKBYTE
- PEN
- PENCOLOR
- PENCOLOR (PC)
- PENDOWN
- PENDOWN (PD)
- PENERASE
- PENERASE (PE)
- PENREVERSE
- PENREVERSE (PX)
- PENUP
- PENUP (PU)
- PI
- PICK
- PLAY
- PLIST
- PO
- POC
475
pages
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Special page