Editing Pascal (programming language) (section)

===Type declarations===
Types can be defined from other types using type declarations:

:<syntaxhighlight lang="pascal">
type
    x = integer;
    y = x;
...
</syntaxhighlight>

Further, complex types can be constructed from simple types:

:<syntaxhighlight lang="pascal">
type
    a = array[1..10] of integer;
    b = record
        x : integer;
        y : char  {extra semicolon not strictly required}
    end;
    c = file of a;
</syntaxhighlight>

Further, complex types can be constructed from other complex types recursively:

:<syntaxhighlight lang="pascal">
const
  Jack  = 11;
  Queen = 12;
  King  = 13;
  Ace   = 14;

type		   
  valueType = 2..Ace;             
  suitType  = club, diamond, heart, spade;

  cardType  = record
                suit:   suitType; 
                value:  valueType;
              end;

  deckType = array [1..52] of cardType;

  person = record
             surname: packed array [1..20] of char; 
			 age: integer;
		   end;

  table = record 
            hands: array [1..3] of deckType;
			players: array [1..4] of person;
          end;
</syntaxhighlight>