arrays                   Lists of Variables                    Data Structure

    Pascal allows the definition (as variables and/or data types) of
    arrays of one or more dimensions. The general format is:

         type
           <tname> = array[<index>] of <basetype>;

         var
           <vname> : array[<index>] of <basetype>;

    where <tname> and <vname> are identifiers for data types and
    variables, respectively. <index> is one or more ranges of ordinal
    types and <basetype> is any data type name or declaration (including
    another array).

    <index> can be defined one of two ways. First, it can be two values
    separated by two periods, that is, <val1>..<val2>, where <val1> and
    <val2> are any two values of the same ordinal data type (Integer,
    Char, Boolean, or enumerated). <val1> has to be less than or equal to
    <val2>.

    The second method is to replace <index> with the name of some ordinal
    type (Char, Boolean, or enumerated; Integer is too large). For
    example, replacing <index> with Char will define an array of 256
    bytes, since the Char type can take 256 different values.

    The largest allowed index range is 32,768 values, while the largest
    possible array is 64K bytes.

    Multi-dimensional arrays can be declared in one of three ways:

         array[<index1>] of array[<index2>] ... of array[<indexN>] of
    <basetype>;

         array[<index1>][<index2>]...[<indexN>] of <basetype>;

         array[<index1>,<index2>,...,<indexN>] of <basetype>;

    Similarly, you can refer to a multi-dimensional element in a given
    array  two different ways:

         <vname>[I][J]...[N]
         <vname>[I,J,...,N]

  -------------------------------- Example ---------------------------------

           var
             Iota : array[1..10] of Char;
             Able : array['A'..'Z'] of Integer;
             Fred : array[-5..5,2..9,'a'..'z'] of string[5];

             begin
               Iota[3] := 'Q';
               Able['R'] := 421;
               Fred[-3,7,'k'] := 'Help!';
             Fred[3][8]['b'] := 'What';
             end.