type
       CInteger  { built-in type }
CInteger is a signed integer type. On some platforms it is 32 bits wide and thus has a range of -2147483648 .. 2147483647.
CInteger in GNU Pascal is compatible to int in GNU C.
There are lots of other integer types in GPC, see Integer Types.
CInteger is a GNU Pascal extension.
     program CIntegerDemo;
     var
       a: CInteger;
     begin
       a := 42;
       WriteLn (a)
     end.