Logo Arts

Primitive	Alt	Action
GlobalMake "var xx Local "var LocalMake "var :xx Thing "var	Make	Assign variable "var value of xx. Always Global. Create variable named "var. Unassigned. Assign variable "var value of xx, in current procedure only. Return value of variable "var.
Run [ list ] Define "name list Text "name	Def	Run (execute) instructions contained in list. Define procedure "name with each line as a list item. Return defined procedure "name as a text list.
List aa bb Sentence aa bb Word aa bb	Se	Return a list composed of aa and bb. Return a sentence composed of aa and bb. Return a word composed of aa and bb.
Bye		Quit XLogo.

Note

1. List , Sentence and Word can be contained in parenthesis.
   eg (List "a "b "c) returns [a b c]
2. Make and GlobalMake are the same, as all variables in XLogo are global unless created with LocalMake . Use GlobalMake to emphasize the variable will be used in a global manner.
3. Procedures are defined in the Editor window. Each procedure starts with 'To' and finishes with 'End' . Any variables after To are passed to the procedure as arguments. If enclosed in brackets they are optional.

Conditionals

Primitive	Action
If cond [list] If cond [list1] [list2] IfElse cond :a :b	If condition is true, then do instructions in list. If condition is true, then do instructions in list1, else do list2. If condition is true, then do :a, else do :b.

Editing

Primitive	Alt	Action
Edit "name or List EditAll To "name	Ed  EdAll	Edit procedure called "name or procedure names in list. Edit all procedures. Edit or create a procedure called "name.

A new procedure can be written by typing 'To ProcedureName ' in the command line. It will overwrite any previous procedures of the same name when you close the Editor window.

Erasing

Primitive	Alt	Action
EraseAll EraseProcedure "Name ErasePropertyList "Name EraseTurtle xx EraseVariable "Name	ErAll ErP  ErPL ErT ErV	Delete all variables procedures and property lists. Delete procedure called "name. Delete property list called "name. Delete turtle number xx. Delete variable called "name.

eg. to delete all variables type in ErV Variables .