INDEX

SYMBOLS

+ (addition operator), 20

= (assignment operator), 23

{...} (command line argument array), 138, 150

-- (comment), 38

/ (division operator), 20

" (double quote), 31

== (equal to operator), 52–53

^ (exponentiation operator), 20

> (greater than operator), 52-53

>= (greater than or equal to operator), 52–53

< (less than operator), 52–53

<= (less than or equal to operator), 52–53

% (modulus operator), 163–164

--[[ ]] (multiline comment), 38

* (multiplication operator), 20

~= (not equal to operator), 52–53

> (prompt), 13, 17

' (single quote), 31

.. (string concatenation operator), 31–32

- (subtraction operator), 20

A

acacia tree, 89

addition operator (+), 20

algorithms, 61

and operator, 65–66

announce program, 159

application programming interface (API), 76

appstore program, 44

arguments, 22, 73

Artemisia, 13, 73

assignment operator (=), 23

assignment statement, 23

ATLauncher, xix, 5

downloading, 2

installing Minecraft with, 3

attack() function, 216

attackDown() function, 216

attackUp() function, 216

B

back() function, 37–39, 215

bedrock, 193

birch tree, 89

blaze rod, 15

blocks, of code, 40

block IDs. See name IDs

bonus activities

cake factory, 123

cobble together more cobblestone furnaces, 110

dance move module, 83

different-colored checkerboards, 171

giant wheat fields, 186

going down, 70

lone turtle farmer, 96

maze runner, 44

mylabel program with command line arguments, 141

new dance moves, 42

plus-shaped rooms, 151

proper introductions, 33

tall tunnel, 207

turtle by any other name, 34

watchturtle, 58

Boolean data type, 49–50, 53

Boolean operators

and operator, 65–66

not operator, 64–65

or operator, 66–67

bots, 9

break statement, 94

brickcrafter program, 116–117

buildFloor() function, 165, 210

buildfloor program, 166

buildRoom() function, 147–149, 210

buildroom program, 149

buildWall() function, 134–137, 145, 151, 210

buildwall program, 137–138

C

cactus, farming, 189–190

calling functions, 19

carrots, planting, 186–187

case sensitive, 25

CC. See ComputerCraft (CC)

ceil() function, 107–108, 211

charcoal, 15

checkerboard, 168–169

chests, 11, 118

chickens, 188

choptree program, 62–63

chunks, loading, 90

coal blocks, 15, 167, 171

cobblestone, 100

cobblestone generator, 100–102, 118

cobminer program, 102–103

command line argument array ({...}), 138, 150

command line arguments, 13, 43, 138

commands

delete, 43

/gamemode, 7

history, 14

ls, 30

shell, 12, 13

comment (--), 38

compare() function, 69, 215

compareDown() function, 69, 215

compareTo() function, 214

compareUp() function, 69, 215

comparison operators, 52–53

ComputerCraft (CC), xviii

API website, 209

installing, 4–5

wiki, xxi

concatenation, 31–32

conditions, 50

constants, 104

countInventory() function, 130, 210

cows, milking, 187–188

craft() function, 116, 121, 216

crafting

bone meal, 88

cakes, 123

coal blocks, 167

computers, 11

mining turtles, 10–12

quartz blocks, 167

stone bricks, 121–122

turtles, 11

creative mode, 6–7, 11

current slot (inventory), 60

D

dance program, 13

dark oak tree, 89

data types, 31

Boolean, 49–50, 53

nil, 50

string, 31

table, 80

delete command, 43

delete() function, 210

detect() function, 64, 104, 215

detectDown() function, 64, 215

detectUp() function, 64, 215

diamond

axe, 60

hoe, 179

pickaxe, 12, 60

shovel, 60

tools, 12, 60

dig() function, 62, 68–69, 216

digDown() function, 69, 182, 202, 216

digUntilClear() function, 197–198, 202, 210

digUp() function, 62, 69, 216

digUpUntilClear() function, 197–198, 207, 210

division operator (/), 20

do keyword, 40, 50

double quote ("), 31

down() function, 39, 42, 215

drop() function, 95, 122, 183, 214

dropDown() function, 95, 214

dropUp() function, 95, 214

E

Edit program, 28

eggs, gathering, 188

Elisabetta, 13, 34, 73

else statement, 54, 55–56

elseif statement, 54

empty string, 31

end keyword, 40, 50

equal to operator (==), 52–53

equipLeft() function, 60, 115, 214

equipRight() function, 60, 115, 214

errors, 21, 29

Movement obstructed, 39

Out of fuel, 39

Unbreakable block detected, 202

error() function, 68, 93, 106, 119, 140, 184, 216

evaluating, expressions, 20

execution, 30, 40

exists() function, 91, 210

exit() function, 19, 216

exponentiation operator (^), 20

expressions, 20–21

F

false value, 18, 50, 51

farmtrees program, 87–88

farmwheat program, 177–179

fences, 174

fields, 154

find() function, 212

findBlock() function, 176, 180, 210

floor() function, 107–108, 211

flow control statements, 40

for loop statement, 40–41, 82–83

forward() function, 37–39, 215

fs.delete() function, 210

fs.exists() function, 91, 210

fuel, 14–16, 39

fuel slot, 105

functions, 19. See also names of individual functions

function statement, 72

passing functions to, 158–160

return statement, 74

return value, 18, 74

furnace, 101–102

fuel slot, 105

input slot, 105

output slot, 105

G

/gamemode command, 7

getComputerLabel() function, 32, 211

getFuelLevel() function, 25–26, 106, 184, 205, 212

getFuelLimit() function, 25–26, 213

getItemCount() function, 79, 108–109, 120, 130, 214

getItemDetail() function, 77, 80, 81, 214

getItemSpace() function, 214

getSelectedSlot() function, 214

givecandy program, 74

glass, 11, 100, 118

global scope, 81–82

go program, 13, 16–17

graphical user interface (GUI), 12–13

gravel, 197, 202

greater than operator (>), 52–53

greater than or equal to operator (>=), 52–53

growth mindset, xx

H

hardcoding, 62, 153

hardcore mode, 7

hare.buildFloor() function, 165, 210

hare.buildRoom() function, 147–149, 210

hare.buildWall() function, 134–137, 145, 151, 210

hare.countInventory() function, 130, 210

hare.digUntilClear() function, 197–198, 202, 210

hare.digUpUntilClear() function, 197–198, 207, 210

hare.findBlock() function, 176, 180, 210

hare program, 75, 128–130, 145–146, 160–161, 176, 197–198

hare.selectAndPlaceDown() function, 130–131, 155, 156, 210

hare.selectEmptySlot() function, 78, 211

hare.selectItem() function, 76, 78–79, 170, 186, 211

hare.sweepField() function, 161–163, 185, 211

hello program, 28

help, xx–xxi

I

if statement, 51–52

indents, 41, 55

infinite loops, 51, 57, 119

input slot, 105

inspect() function, 92–93, 176–177, 215, 218

inspectDown() function, 181–182, 216

inspectUp() function, 216

interpreter, Lua, xviii–xix, 30

inventory

current slot, 60

of player, 12

of turtle, 12

slots, 13, 78

stack, 13

io.read() function, 33, 211

iron, 11, 100

irrigation of crops, 174

iteration, 40

J

.jar files, 4

jungle tree, 89

L

label program, 13, 32

lava, 100

lava bucket, 15

Lavinia, 13, 74

less than operator (<), 52–53

less than or equal to operator (<=), 52–53

loadAPI() function, 76, 211

local scope, 81–82

Logo, 9–10

loops

for loop statement, 40–41, 82–83

infinite, 51, 57, 119

while loop statement, 50

ls command, 30

Lua, xviii

interpreter, xviii–xix, 30

shell, 17–19

lua program, 13, 17–19

lua> prompt, 17

M

math.ceil() function, 107–108, 211

math.floor() function, 107–108, 211

math.random() function, 22, 211

maze, 44

'metadata' key, 181–182

Minecraft

buying, 2

creating a new world, 6

modes, 6–7

running, 5–7

sales, xvii

Minecraft Forge mod, 3

mods, xviii

use on a server, 3

vanilla Minecraft, xviii

modpacks, 3

modules, 19, 75

modulus operator (%), 163–164

Movement obstructed error, 39

multiplayer server, 3, 5

multiline comment (--[[ ]]), 38

multiplication operator (*), 20

mydance program, 36–37

mydance2 program, 47–48

mylabel program, 34, 141

N

name IDs, 77, 217–226

'minecraft:cactus', 190

'minecraft:carrot', 186

'minecraft:chest', 176, 180, 183

'minecraft:coal_block', 170

'minecraft:cobblestone', 106

'minecraft:dye', 93

'minecraft:log', 76–77, 79, 81, 95

'minecraft:potato', 186

'minecraft:quartz_block', 170

'minecraft:reeds', 190

'minecraft:sapling', 89, 91, 93

'minecraft:wheat', 181, 183

'minecraft:wheat_seeds', 182, 186

nesting, 54–55, 135

Nether quartz, 167

nil data type, 50

not equal to operator (~=), 52–53

not operator, 64–65

O

oak tree, 89

obsidian, xvii, 100

operators, 20

Boolean, 64–67

comparison, 52–53

math, 20–21

order of operations, 21

or operator, 66–67

os.getComputerLabel() function, 32, 211

os.loadAPI() function, 76, 211

os.setComputerLabel() function, 33–34, 211

os.sleep() function, 96, 105, 110, 122, 186, 211

Out of fuel error, 39

output slot, 105

overwriting variables, 24

P

parameters, 73

passing arguments, 23, 73

password, 2

pastebin, 42–43

pastebin program, 43

get 1aZ8BhNX buildwall, 138, 150

get 1zS07K3U brickcrafter, 119

get 8NgPXXxN choptree, 64

get BLCJbpQJ mydance, 43

get Epr9CndN buildfloor, 166

get iXRkjNsG appstore, 44

get PGH1WYpH stairminer, 200

get QAH0uYqS mydance2, 49

get QQQK3mqk buildcheckerboard, 168

get SfcB8b55 farmwheat, 179

get sML2CbZ3 announce, 159

get U0WVM4wg buildroom, 150

get v5h8AgGs farmtrees, 89

get wwzvaKuW hare, 76, 103, 130, 146, 150, 161, 176, 198, 210

get YhvSiw7e cobminer, 103

pickaxe, 10, 12, 13, 14, 60

place() function, 91–92, 212, 216

placeDown() function, 92, 183, 212

placeUp() function, 92, 212

planks, 14, 15, 218–219

planting

carrots, 186–187

potatoes, 186–187

saplings, 86, 91–92

vegetables, 186–187

wheat seeds, 182–183

print() function, 30–31, 216

programs. See also names of individual programs

running, 29–30

saving, 28–29

stopping, 13, 16, 50, 180

programming language, 17

prompt (>), 13, 17

public server, 3, 5

Q

quartz blocks, 167, 171

R

random() function, 22, 211

read() function, 33, 211

redstone, 11

refuel() function, 205, 214

refuel program, 13, 15–16

Render Distance option, Minecraft, 90

return statement, 74

return value, 18, 74

rom folder, 30

room-building algorithm, 144–145

running programs, 29–30

S

sand blocks, 189, 197, 202

saplings, planting, 86, 91–92

saving programs, 28–29

sayhello program, 73

scope

global, 81–82

local, 81–82

select() function, 79, 116, 122, 214

selectAndPlaceDown() function, 130–131, 155, 156, 210

selectEmptySlot() function, 78, 211

selectItem() function, 76, 78–79, 170, 186, 211

setComputerLabel() function, 33–34, 211

sheep, shearing, 187–188

shell

command, 12, 13

Lua, 17–19

shell.run() function, 70, 94, 212

single quote ('), 31

sleep() function, 96, 105, 110, 122, 186, 211

slots (inventory), 13, 78. See also current slot

slowPrint() function, 33, 212

Sofonisba, 13, 29, 32

source code, 28

spruce tree, 89

stack (inventory), 13

stairminer program, 199–200

stair-mining algorithm, 193–197

step number, 41

sticks, 14

stone bricks, 121–122

strings

concatenation operator (..), 31–32

data type, 31

empty, 31

string.find() function, 212

string.sub() function, 212

subtraction operator (-), 20

suck() function, 120, 214

suckDown() function, 120, 188, 215

suckUp() function, 120, 215

sugar cane, farming, 189–190

survival mode, 6–7, 11, 127, 173

sweeping algorithm, 154–158

sweepField() function, 161–163, 185, 211

sweepFunc parameter, 154–155

T

table data type, 80, 93

text editor, 5

running programs in, 29–30

saving programs in, 28–29

textutils.slowPrint() function, 33, 212

then keyword, 52

toggling, 136, 163, 170

tonumber() function, 139, 180, 201

tools

diamond, 12, 60

wooden, 14

transferTo() function, 121, 215

tree-chopping algorithm, 61–62

tree-farming algorithm, 86

tree types, 89

true value, 18, 50, 51

turtleappstore.com, 44

turtle.attack() function, 216

turtle.attackDown() function, 216

turtle.attackUp() function, 216

turtle.back() function, 37–39, 215

turtle.compare() function, 69, 215

turtle.compareDown() function, 69, 215

turtle.compareTo() function, 214

turtle.compareUp() function, 69, 215

turtle.craft() function, 116, 121, 216

turtle.detect() function, 64, 104, 215

turtle.detectDown() function, 64, 215

turtle.detectUp() function, 64, 215

turtle.dig() function, 62, 68–69, 216

turtle.digDown() function, 69, 182, 202, 216

turtle.digUp() function, 62, 69, 216

turtle.down() function, 39, 42, 215

turtle.drop() function, 95, 122, 183, 214

turtle.dropDown() function, 95, 214

turtle.dropUp() function, 95, 214

turtle.equipLeft() function, 60, 115, 214

turtle.equipRight() function, 60, 115, 214

turtle.forward() function, 37–39, 215

turtle.getFuelLevel() function, 25–26, 106, 184, 205, 212

turtle.getFuelLimit() function, 25–26, 213

turtle.getItemCount() function, 79, 108–109, 120, 130, 214

turtle.getItemDetail() function, 77, 80, 81, 214

turtle.getItemSpace() function, 214

turtle.getSelectedSlot() function, 214

turtle.inspect() function, 92–93, 176–177, 215, 218

turtle.inspectDown() function, 181–182, 216

turtle.inspectUp() function, 216

turtle.place() function, 91–92, 212, 216

turtle.placeDown() function, 92, 183, 212

turtle.placeUp() function, 92, 212

turtle.refuel() function, 205, 214

turtles, xviii, 9

turtle.select() function, 79, 116, 122, 214

turtle.suck() function, 120, 214

turtle.suckDown() function, 120, 188, 215

turtle.suckUp() function, 120, 215

turtle.transferTo() function, 121, 215

turtle.turnLeft() function, 18–19, 38, 215

turtle.turnRight() function, 19, 38, 215

turtle.up() function, 39, 42, 215

tutorials, xx–xxi

typewriter effect, 33, 212

U

Unbreakable block detected error, 202

up() function, 39, 42, 215

usage messages, 139–140, 150, 166, 180, 201

V

values, 20

false, 18, 50, 51

return, 18, 74

true, 18, 50, 51

vanilla Minecraft, xviii

variables, 23

constant, 104

names, 25

overwriting of, 24

vegetables, planting, 186–187

W

wall-building algorithm, 131–134

water, 100, 174

water bucket, 174

watermelon, 127–128

wheat, 174–175

wheat-farming algorithm, 175–176

wheat seeds, planting, 182–183

while loop statement, 50

wiki, ComputerCraft, xxi

wood, 14

wood planks, 14, 15, 218–219

wooden tools, 14