1.4 Identiers

Identiers denote constants, types, variables, procedures and functions, units, and programs. All names of things that are dened somehow in the source code are identiers.

An identier consists of at most 255 signicant characters (letters, digits and the underscore character), from which the rst must be an alphanumeric character, or an underscore (_) The following diagram gives the basic syntax for identiers.

_________________________________________________________________________________________________________Identiers
-- --identi  er--letter------------------------------------------------
              --x ---|6--letter---|
                        |digit--|
                        --x ---
___________________________________________________________________