Keyword	Description	Inactive under	Is function?
true	boolean true literal		no
false	boolean false literal		no
let	variable declaration		no
const	constant declaration		no
if	if statement		no
else	else block of if statement		no
switch	matching		no
do	looping		no
while	while loop condition for do loop		no
until	do loop		no
loop	infinite loop		no
for	for loop		no
in	containment test part of for loop		no
!in	negated containment test		no
continue	continue a loop at the next iteration		no
break	break out of loop iteration		no
return	return value		no
throw	throw exception		no
try	trap exception		no
catch	catch exception		no
import	import module	no_module	no
export	export variable	no_module	no
as	alias for variable export	no_module	no
global	automatic global module	no_module, no_function	no
private	mark function private	no_function	no
fn (lower-case f)	function definition	no_function	no
Fn (capital F)	create a function pointer		yes
call	call a function pointer		yes
curry	curry a function pointer		yes
is_shared	is a variable shared?	no_function, no_closure	yes
is_def_fn	is function defined?	no_function	yes
is_def_var	is variable defined?		yes
this	reference to base object for method call	no_function	no
type_of	get type name of value		yes
print	print value		yes
debug	print value in debug format		yes
eval	evaluate script		yes

Keyword	Potential usage
var	variable declaration
static	variable declaration
shared	share value
goto	control flow
match	matching
case	matching
public	function/field access
protected	function/field access
new	constructor
use	import namespace
with	scope
is	type check
module	module
package	package
super	base class/module
thread	threading
spawn	threading
go	threading
await	async
async	async
sync	async
yield	async
default	special value
void	special value
null	special value
nil	special value