Identifiers

Identifiers are names used for variables, functions, types, and other entities. They must start with a letter or an underscore and can contain letters, digits, and underscores.

let name = "Motoko";
let a1 = 123;
let camelCaseIdentifier = "best practice";
let snake_case_identifier = "for compatibility with other languages";

Reserved syntax keywords

Motoko reserves certain words for its syntax and they cannot be used as identifiers. These include:

actor	async*	composite	false
and	await	continue	flexible
assert	await*	debug	finally
async	break	debug_show	for
case	catch	do	from_candid
func	if	ignore	import
in	label	let	loop
module	not	null	object
or	persistent	private	public
query	return	shared	stable
switch	system	throw	to_candid
transient	true	try	type
var	while	with	class