Let us examine metalanguage descriptions for defining and using multi-dimensional arrays, arrays of records, files and random number generators in a variety of highlevel languages

1. Declaring multi-dimensional arrays and arrays of records

https://drive.google.com/open?id=0BwzvXeA1LcQuMzVTblJaNTNFSms

1. Steps involved in declaring a variable:
1. If data type does not exist - then must be defined
2. A variable of that data type is declared
2. Declaring Arrays, Files or Records:
   
   
1. The TYPE statement is used to create a user defined data type.
2. DefineDataType=
          TYPE <varname>=
                (ARRAY”[“<range>{,<range>}”]”OF<type>)|
                (FILE OF <type>)|
                (RECORD<varname>:<type>{;<varname>:<type>}END);

        Eg.    Multidimensional Array
                TYPE

    ProductType = ARRAY[0..19] OF Char;
    ProductArrayType = ARRAY[0..10,0..4,0..99] OF ProductType;

VAR
    Products : ProductArrayType;

                   Record Type - comprising Fields of Arrays 

                 TYPE

                    CustomerRecType=
                            RECORD
                                    Surname : ARRAY[1..20] OF Char;
                                    FirstName : ARRAY[1..20] OF Char;
                                    Gender : Char;
                                    Email : ARRAY[1..30] OF Char
                            END;

2. Using Arrays of Records and Files

BEGIN StoreCustomers (FileName)

        Open Filename for output
        Count=0
        WHILE Count<=500
                Write Filename from Customers(Count)
                Add 1 to Count
        ENDWHILE
        Close Filename

END StoreCustomers

https://drive.google.com/open?id=0BwzvXeA1LcQuRlpFMVVQZTlHOGM