Identi ers denote constants, types, variables, procedures and functions, units, and programs. All names of things that are de ned somehow in the source code are identi ers.
An identi er consists of at most 255 signi cant 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 identi ers.
_________________________________________________________________________________________________________Identi ers
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