program header uses clause const declarations type declarations var declarations begin end write and writeln readln comments compiler directives

integer types real types boolean char string enumerated types subranges sets records variant records

if then else case statement for to loop for downto loop while loop repeat until break continue exit with statement

procedure declaration function declaration value parameters var parameters const parameters default parameters forward declarations nested routines recursion function result

static arrays dynamic arrays open arrays multidimensional arrays array bounds pointers new and dispose nil pointers typed files pointer records

classes constructors destructors visibility inheritance virtual methods override abstract methods interfaces properties

unit interface unit implementation initialization section finalization section namespaces generic procedures generic classes specialize keyword operator overloading class helpers

text files AssignFile Reset and Rewrite BlockRead pattern IOResult exceptions try except try finally raise assert