Name 

Description 

Identifiers 

Here is the formal definition of an identifier:
identifier:

• nondigit
• identifier nondigit
• identifier digit

nondigit: one of

• a b c d e f g h i j k l m n o p q r s t u v w x y z _
• A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

digit: one of

• 0 1 2 3 4
• ef5 6 7 8 9

Naming and length restrictions
Identifiers are arbitrary names of any length given to classes, objects, functions, variables,... more