[Top] - [Next] - [Previous]

Appendix: Command Summaries

1. Monitor Mode
2. Explain Mode
3. World Builder

Monitor Mode

Monitor Mode Command Summary: There are 3 parts to each Monitor Command, and their order is important. If any part is omitted, its default value (see []) will be used.

	Speed Change([F]ast, [M]edium, or [S]low).
	Execution Direction ([+] for advance or [-] for retreat).
	Number of instructions to step (default value is 1 primitive).

If only a Speed Change or Execution Direction is supplied, the execution will not advance or retreat. Instead of a number, you may also type B, D, E, I, L, O, P, Q, R, T, or U:

	B means retreat execution to the program's Beginning at the present speed.
	D means Display the Defined instructions that are currently executing.
	E means advance execution to the program's End at the present speed.
	I means trace Inside the supplied Instruction name.
	L means Look at an arbitrary portion of the world.
	O means change the execution Options.
	P means Print the definition of a defined instruction.
	Q means Quit the program at the fast speed.
	R means Re-Draw the display.
	T means Trace To the next occurrence of the supplied instruction name.
	U means Undo Instruction tracing (cancels the I command).

Explain Mode

Explain Mode Command Summary:

	D means Display the defined instructions that are currently executing.
	L means Look at an arbitrary portion of the world.
	O means change the execution Options.
	P means Print the definition of a defined instruction.
	R means to Re-Draw the display.

	A positive number goes forward that many explanations before reprompting.
	A negative number goes forward that many primitives before reprompting.

Note that in Explain Mode, execution can go only forward. Pressing the RETURN key causes Explain Mode to explain the next step.

World Builder

World Builder Command Summary:

M   Move Karel to a new corner.
     "M E 5"   = Move East 5 blocks.
     "M 8,13"  = Move to 8th Street and 13th Avenue.
F   Face Karel in a new compass direction ("F N" = Face North    ).
L   Load beepers in Karel's beeper bag    ("L 3" = Load 3 beepers).
P   Put beepers on Karel's corner.
     "P 2"     = Put 2 beepers on Karel's Corner.
     "P 2 E 5" = Put 2 beepers on the next 5 corners going East.
B   Build a Wall.
     "B NSE"   = Build walls to the North, South, and East.
     "B E 4 N" = Build walls to the East on the next 4 corners going North.
D   Destroy a wall (see "Build a Wall" for examples).
R   Re-Draw the display (in case it is accidentally erased).
E   Exit the world builder and start execution.
S   Save the world and then exit the world builder.
T   Temporarily save the world and then return to the world builder.
K   Kill the entire world (blank it out) and restart building.
?   Print this message.

[Top] - [Next] - [Previous]