Elan Index and Symbols

Elan Index

This index contains:

Colour coding of terms
Index of terms
IDE buttons
Punctuation symbols

Colour coding of terms

keyword : Type : method : constant : property : comment : Topic : Section in documentation

Index of terms

🅰 🅱 🅲 🅳 🅴 🅵 🅶 🅷 🅸 🅹 🅺 🅻 🅼 🅽 🅾 🅿 🆀 🆁 🆂 🆃 🆄 🆅 🆆 🆇 🆈 🆉

Term	Category	Topic links
A return to top
abs	method	Maths functions
abstract class	keyword	interface
abstract function	topic
abstract procedure	topic
abstract property	topic
acos	method	Maths functions
add	method	Dot methods on a HashSet
addFromList	method	Dot methods on a HashSet
alt	property	Properties of Vector graphic shapes
and	keyword	Logical operators
append	method	Procedure methods on a List
Append code	IDE	Load, run, and save programs
appendList	method	Procedure methods on a List
Argument	topic	procedure and function
Arithmetic operators	topic
as	keyword	Parameters
asBinary	method	Dot methods on an Int
ASCII	topic	Character sets
asHtml	method	Displaying images from URLs
asin	method	Maths functions
asList	method	Dot methods on a HashSet
AsRef	Type	Call by reference
asRegExp	method	Dot methods on a String
assert	keyword	test
asSet	method	Common dot methods
asSVG	method	Displaying images from URLs
asUnicode	method	Dot methods on a String
atan	method	Maths functions
B return to top
bitAnd	method	Bitwise functions
bitNot	method	Bitwise functions
bitOr	method	Bitwise functions
bitShiftL	method	Bitwise functions
bitShiftR	method	Bitwise functions
bitXor	method	Bitwise functions
black	constant	Colour constants
Block graphics	topic	Colour constants
blue	constant	Colour constants
Boolean	Type	Named value data Type
Breakpoint	IDE	Debugging programs
brown	constant	Colour constants
C return to top
call	keyword	Global instructions
Call by reference	topic
catch	keyword	try (test)
ceiling	method	Dot methods on a Float
centreX, centreY	properties	Properties of Vector graphic shapes
Character sets	topic
CircleVG	Type	Vector graphics
class	keyword
clearAllDisplays	method
clearAndReset	method	Turtle graphics
clearBlocks	method	Block graphics
clearHtml	method	Rendering Html in the display
clearKeyBuffer	method	Standalone procedures
clearPrintedText	method	Standalone procedures
clearVectorGraphics	method	Vector graphics
clock	method	Miscellaneous methods
close	method	Reading text files
closeBrace	constant	String constants
Colours	topic
Combining graphic outputs	topic
comment #	keyword
Compilation	topic	Load, run, and save programs
Compile errors	topic	Compile Errors and Warnings
constant (global)	keyword
constant (local)	keyword
Constants (system)	topic
constructor	keyword
contains	method	Common dot methods
Context menu	IDE	Debugging programs
copy	method	System functions
cos	method	Maths functions
createBlockGraphics	method	Block graphics
createFileForWriting	method	Writing text files
createList	method	System functions
createListOfLists	method	System functions
CSS	topic	Rendering Html in the display
D return to top
Deconstruction	topic	List, Tuple
degrees	method	Maths functions
dequeue	method	Dot methods on a Queue
Dictionary	Type	Standard data structures
difference	method	Dot methods on a HashSet
Display	IDE	Navigate around the IDE
displayBlocks	method	Block graphics
displayHtml	method	Rendering Html in the display
displayVectorGraphics	method	Vector Graphics
divAsFloat	method	Maths functions
divAsInt	method	Maths functions
Dot method	topic
Dot syntax	topic
E return to top
Editor	IDE	Navigate around the IDE
elif	keyword	if (instruction), if expression
else	keyword	if (instruction), if expression
end	keyword	automatically supplied at end of program constructs
endOfFile	method	Reading text files
enqueue	method	Dot methods on a Queue
enum	keyword
Equality testing	topic
equals	method	Common dot methods
exception	keyword	try
exp	method	Maths functions
Expression	topic
Extension function	topic
Extension procedure	topic
F return to top
false	constant	Boolean constants
Field	IDE	Create new instructions
File input/output	topic
fillColour	property	Properties of Vector graphic shapes
filter	method	Higher-order functions on a List
Float	Type	Named value data Type
floor	method	Dot methods on a Float
for loop	keyword
from	keyword
Func	Type
function	keyword
Function method	topic
Function reference	topic	Passing a function as a reference
Functional programming	topic
G return to top
getKey	method	Keyboard input
getKeyWithModifier	method	Keyboard input
getNumericKey	method	Keyboard input
Ghosting	topic	Edit instructions
global	keyword	Scope and name qualification
Global instructions	topic
Global prompt	IDE	Browse code
Graphics	topic	Block Graphics , Turtle graphics , Vector graphics
green	constant	Colour constants
grey	constant	Colour constants
H return to top
HashSet	Type	Standard data structures
hasKey	method	Dot methods on a Dictionary
head	method	Dot methods on a List
heading	property	Properties of a Turtle
height	property	Properties of Vector graphic shapes
Hexadecimal	topic	Int, Colours , unicode
hide	method	Turtle graphics
HoF	topic	Higher-order Functions (HoFs)
HTML	topic	Rendering Html in the display
I return to top
IDE	IDE	Integrated Development Environment
IDE Buttons	IDE	Integrated Development Environment
Identifier	topic	Identifiers and Type names
if (instruction)	keyword
if (expression)	keyword
image	keyword	Displaying images from URLs
ImageVG	Type	Vector graphics
Immutability	topic	Mutability of named values
Import code	IDE	Load, run, and save programs
in	keyword	for loop
Indexed values	topic
indexOf	method	Common dot methods
inherits	keyword
initialise	method	Procedure methods on a List
initialiseFromClock	method	Random
Input, keyboard	topic	Keyboard input Navigate around the IDE
Input, file	topic	Text file input/output
inputFloat	method	Keyboard input
inputFloatBetween	method	Keyboard input
inputInt	method	Keyboard input
inputIntBetween	method	Keyboard input
input	method	Keyboard input
inputStringFromOptions	method	Keyboard input
inputStringWithLimits	method	Keyboard input
insert	method	Procedure methods on a List
Instance	topic
Instruction	IDE	Create new instructions
Int	Type	Named value data Type
interface	keyword
Interpolated string	topic
intersection	method	Dot methods on a HashSet
is	keyword
isAfter	method	Dot methods on a String
isAfterOrSameAs	method	Dot methods on a String
isBefore	method	Dot methods on a String
isBeforeOrSameAs	method	Dot methods on a String
isDisjointFrom	method	Dot methods on a HashSet
isInfinite	method	Maths functions
isNaN	method	Maths functions
isnt	keyword
isSubsetOf	method	Dot methods on a HashSet
isSupersetOf	method	Dot methods on a HashSet
item_N	property	iitem_0, item_1,... in Tuple
J return to top
join	method	Dot methods on a List
K return to top
Keyboard (editor)	IDE	Navigate around the IDE
Keyboard (input)	topic	Standalone procedures
keys	method	Dot methods on a Dictionary
L return to top
lambda	keyword
length	method	Common dot methods
library	keyword	Scope and name qualification
LineVG	Type	Vector graphics
List	Type	Standard data structures
Literal value	topic
log10	method	Maths functions
log2	method	Maths functions
logE	method	Maths functions
Logical operators	topic
lowerCase	method	Dot methods on a String
M return to top
main	keyword
map	method	Higher-order functions on a List
matchesRegExp	method	Dot methods on a String
maxBy	method	Higher-order functions on a List
max	method	System functions
Member instructions	topic
Member prompt	IDE	Browse code
Method	topic
minBy	method	Higher-order functions on a List
min	method	System functions
mod	keyword	Arithmetic operators
Mouse	topic	Navigate around the IDE
move	method	Turtle graphics
moveTo	method	Turtle graphics
Mutability	topic	Mutability of named values
N return to top
Named value	topic
new	keyword
new code prompt	IDE	Browse code
next	method	Random
nextInt	method	Random
not	keyword	Logical operators
notEqualTo	method	Common dot methods
Numeric comparison	topic	Equality testing
O return to top
Object-oriented programming	topic
of	keyword	<of Type> in Standard data structures
openBrace	constant	String constants
openFileForReading	method	Reading text files
Operator	topic
or	keyword	Logical operators
orderBy	method	Higher-order functions on a List
Output, file	topic	Writing text files
P return to top
Parameter	topic
parseAsFloat	method	Standalone functions
parseAsInt	method	Standalone functions
peek	method	Common dot methods
penColour	method	Turtle graphics and Colours
penDown	method	Turtle graphics
penUp	method	Turtle graphics
penWidth	method	Turtle graphics
pi	constant	Maths constant
placeAt	method	Turtle graphics
pop	method	Dot methods on a Stack
power	topic	Arithmetic operators
prepend	method	Procedure methods on a List
prependList	method	Procedure methods on a List
pressAnyKeyToContinue	method	Standalone procedures
print	method	Standalone procedures
printNoLine	method	Standalone procedures
printTab	method	Standalone procedures
private	keyword	applied to Class procedures, functions and properties
Procedural programming	topic
procedure	keyword
Prompt	IDE	Browse code
property	keyword
Punctuation symbols	topic
push	method	Dot methods on a Stack
Q return to top
Queue FIFO	Type	IStandard data structures
quotes	constant	String constants
R return to top
radians	method	Maths functions
radius	property	Properties of Vector graphic shapes
random	method	Miscellaneous methods
Random	Type
randint	method	Miscellaneous methods
range	method	System functions , Indexed values
rangeInSteps	method	System functions , Indexed values
rawSVGcontent	property	Vector graphics
RawVG	Type	Vector graphics
readLine	method	Reading text files
readWholeFile	method	Reading text files
RectangleVG	Type	Vector graphics
Recursion	topic
red	constant	Colour constants
reduce	method	Higher-order functions on a List
Reference data Type	topic
Regular expression (RegExp)	topic
remove	method	Dot methods on a HashSet
removeAll	method	Procedure methods on a List
removeAt	methods	Common procedure methods
removeFirst	method	Procedure methods on a List
replace	method	Dot methods on a String
return	keyword	function
returns	keyword	function
round	method	Dot methods on a Float
Run controls	IDE	Load, run, and save programs
S return to top
saveAndClose	method	Writing text files
Scope	topic
set	keyword
set	method	Call by reference
setAlt	method	Properties of Vector graphic shapes
setCentreX	method	Properties of Vector graphic shapes
setCentreY	method	Properties of Vector graphic shapes
setFillColour	method	Properties of Vector graphic shapes
setHeight	method	Properties of Vector graphic shapes
setRadius	method	Properties of Vector graphic shapes
setStrokeColour	method	Properties of Vector graphic shapes
setStrokeWidth	method	Properties of Vector graphic shapes
setTitle	method	Properties of Vector graphic shapes
setWidth	method	Properties of Vector graphic shapes
setX, setY	methods	Properties of Vector graphic shapes
setX1, setY1, setX2, setY2	methods	Properties of Vector graphic shapes
show	method	Procedure methods on a turtle
sin	method	Maths functions
sleep	method
sleep_ms	method
split	method	Dot methods on a String
sqrt	method	Maths functions
Stack LIFO	Type	Standard data structures
Standalone function	topic
Standalone procedure	topic
Standard data structures	topic
Statement instruction	topic
step	keyword	for loop
String	Type	Named value Types
strokeColour	property	Properties of Vector graphic shapes
strokeWidth	property	Properties of Vector graphic shapes
subList	method	Dot methods on a List
subString	method	Dot methods on a String
Symbols, punctuation	topic
System method	topic
T return to top
tail	method	List
tan	method	Maths functions
test	keyword
Text file input/output	topic
TextFileReader	Type	Reading text files
TextFileWriter	Type	Writing text files
then	keyword	if instruction, if expression
this	keyword	Class
throw	keyword
title	property	Properties of Vector graphic shapes
to	keyword	for loop
tone	method	Sound output
toString	method	Common dot methods
transparent	constant	Colour constants
trim	method	Dot methods on a String
true	constant	Boolean constants
try	keyword
Tuple	topic
turn	method	Turtle graphics
turnToHeading	method	Turtle graphics
Turtle	Type
Type	topic
Type name	topic
U return to top
unicode	method	Character sets
union	method	Dot methods on a HashSet
upperCase	method	Dot methods on a String
V return to top
value	method	Call by reference
Value data Type	topic
values	method	Dot methods on a Dictionary
variable	keyword
Vector graphics	topic
VectorGraphic	Type	Vector graphics
W return to top
waitForKey	method	Keyboard input
while loop	keyword
white	constant	Colour constants
width	property	Properties of Vector graphic shapes
withAlt	method	Properties of Vector graphic shapes
withAppend	method	Dot methods on a List
withAppendList	method	Dot methods on a List
withCentreX	method	Properties of Vector graphic shapes
withCentreY	method	Properties of Vector graphic shapes
withFillColour	method	Properties of Vector graphic shapes
withHeight	method	Properties of Vector graphic shapes
withInsert	method	Dot methods on a List
withPrepend	method	Dot methods on a List
withPrependList	method	Dot methods on a List
withRadius	method	Properties of Vector graphic shapes
withRemoveAll	method	Dot methods on a List
withRemoveAt	method	Common dot methods
withRemoveFirst	method	Dot methods on a List
withSet	method	Common dot methods
withStrokeColour	method	Properties of Vector graphic shapes
withStrokeWidth	method	Properties of Vector graphic shapes
withTitle	method	Properties of Vector graphic shapes
withWidth	method	Properties of Vector graphic shapes
withX, withY	methods	Properties of Vector graphic shapes
withX1, withY1, withX2, withY2	methods	Properties of Vector graphic shapes
writeLine	method	Writing text files
writeWholeFile	method	Writing text files
X return to top
x, y (Turtle)	properties	Turtle graphics properties
x, y (VectorGraphic)	properties	Properties of Vector graphic shapes
x1, y1, x2, y2 (VectorGraphic)	properties	Properties of Vector graphic shapes
Y return to top
yellow	constant	Colour constants
Z return to top

IDE buttons

Button	Function	Topic links
demo ▼	Opens menu of demo programs	Load, run, and save programs
file ▼	Opens menu of program file operations	Load, run, and save programs
trim	Removes code prompts	Browse code
outline	Toggles outlining of code	Browse code
undo	Undoes changes to last valid code	Edit instructions
redo	Applies the saved changes	Edit instructions
Reference Language ▼	Opens menu of supported languages	Edit instructions
run	Runs the program	Load, run, and save programs
stop	Stops the running program	Load, run, and save programs
debug	Enters debugging mode	Debugging programs
pause	Pauses program execution in debug mode	Debugging programs
step	Steps through program in debug mode	Debugging programs
clear	Clears the display of text and graphics	Navigate around the IDE
display	Gives the display the input focus	Navigate around the IDE
info	Displays runtime errors or show debugging information	Navigate around the IDE
help	Opens the Elan documentation	Navigate around the IDE
worksheet	Offers standard and external worksheets	Navigate around the IDE

Punctuation symbols

Punctuation symbols
( )	(round) brackets	used in arithmetic or logical expressions to define the order of evaluation, and to enclose a list of arguments or parameters
[ ]	square brackets	used to enclose a literal list in a mutable structure: List or Dictionary , or to define an index, or an index range
{ }	curly braces	used to define interpolated fields within a string See also the constants openBrace and closeBrace
$	dollar	used before the opening quotes of a string so that interpolated fields (enclosed in curly braces) can be included in the string
.	dot, full stop, period	used in defining a fractional (non-integer) number (a Float ), or to access a method or property using dot syntax
,	comma	used to separate items in several forms of list
:	colon	used to define a key:value pair in a literal Dictionary
+	plus	the addition operator
-	minus	the subtraction operator, or the unary negation operator
*	multiply	the multiplication operator
/	divide	the division operator for two numeric values at least one of which must be a Float, also used to delimit a literal Regular expression (RegExp)
<	less than	comparison operator
>	greater than	comparison operator
<=	less than or equal to	comparison operator
>=	greater than or equal to	comparison operator
=>	fat arrow	used in a lambda and in a Func definition to signify 'returns'
_	underscore	the only punctuation symbol that may be used within a named value identifier or a Type name , also used when referring to an item in a Tuple, e.g. item_2
'	single quote apostrophe	delimiter for a literal String that may contain double quotes
"	double quotes	delimiter for a literal String that may contain sengle quotes See also the constant quotes
#	hash	automatically prefaces a comment

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