An identifier is a sequence of any letters and numbers, starting with a letter, which is not a keyword or an operator. Identifiers are used to define program variables, constants, types, procedures, functions, the program itself, and so on. When creating identifiers, follow the rules:
An identifier may contain only letters, numbers and underscore ("_") characters.
Its first symbol is a letter or an underscore ("_") character.
The compiler is not case-sensitive.
The maximum length of an identifier is 255 symbols.
In the BNF language the identifier looks as follows:
$ ident = letter {letter | digit | "_"}.
See also: