function SizeOf (var x): SizeType;
Returns the size of a type or variable in bytes.
SizeOf can be applied to expressions and type names. If the argument is a polymorphic object, the size of its actual type is returned.
SizeOf is a UCSD Pascal extension.
program SizeOfDemo; var a: Integer; b: array [1 .. 8] of Char; begin WriteLn (SizeOf (a)); { Size of an `Integer'; often 4 bytes. } WriteLn (SizeOf (Integer)); { The same. } WriteLn (SizeOf (b)) { Size of eight `Char's; usually 8 bytes. } end.