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
• and
• assert
• async
• async*
• await
• await*
• break
• case
• catch
• class
• composite
• continue
• debug
• debug_show
• do
• else
• false
• flexible
• finally
• for
• 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