HP 3000 Manuals

HP Pascal/iX Reference Manual

Chapter 3  Data Types 

One of the most important contributions and fundamental ideas of Pascal
is the formalization of the concept of a data type.  A data type is a
collection of elements that belong together because they are all formed
in the same way and are treated uniformly.

There are three categories of data types in HP Pascal.  They are:

   *   Simple

   *   Structured

   *   Pointer

These data types are used to determine a set of attributes that include:

   *   The set of permissible values that an object of a specified type
       may assume.

   *   The set of permissible operations that may be performed on an
       object of a specified type.

   *   The amount of storage that variables of a specified type require.

Figure 3-1  summarizes the various data types in HP Pascal.  A
detailed discussion of the data types in each category follows in this
chapter.  When appropriate, permissible operators, standard procedures,
standard functions, and examples are given.


NOTE  The system programming extensions, if enabled, define additional
      data types.  See Chapter 11  for more information.


Syntax 

     Type:


            


          Figure 3-1.  HP Pascal Data Types 

MPE/iX 5.0 Documentation