SmartPascal
Of
Keyword
Linking keyword used in many places
  1 Case variable Of ...
  2 type name = Set   Of range;
  3 type name = Class Of class type;
  4 var  name : Array Of type;
  5 var  name : File  Of type;
Description
The Of keyword is used as a link in a number of Delphi declarations.
Related commands
Array A data type holding indexable collections of data
Case A mechanism for acting upon different values of an Ordinal
Class Starts the declaration of a type of object class
File Defines a typed or untyped file
Set Defines a set of up to 255 distinct values
 
Example code : A simple example
var
  letters : set Of 'a'..'z';

begin
  // Set all of the set values on
  letters := ['a'..'z'];

  // See if a letter is lower case
  if 'g' in letters
  then ShowMessage('g is a lower case letter')
  else ShowMessage('g is not a lower case letter');
end;
Show full unit code
   g is a lower case letter