About Properties A property, like a field, defines an attribute of an object. But while a field is merely a storage location whose contents
can be examined and changed, a property associates specific actions with reading or modifying its data. Properties
provide control over access to an object's attributes, and they allow attributes to be computed.
The declaration of a property specifies a name and a type, and includes at least one access specifier. The syntax
of a property declaration is
property propertyName[indexes]: type index
integerConstant specifiers; where
propertyName is any valid identifier.
[indexes] is optional and is a sequence of parameter declarations separated by semicolons. Each parameter
declaration has the form identifier1, ..., identifiern: type. For more information, see Array Properties, below.
type must be a predefined or previously declared type identifier. That is, property declarations like
property
Num: 0..9
... are invalid.
the index integerConstant clause is optional. For more information, see Index Specifiers, below.
specifiers is a sequence of read, write, stored, default (or nodefault), and implements specifiers. Every property
declaration must have at least one read or write specifier.
Properties are defined by their access specifiers. Unlike fields, properties cannot be passed as var parameters, nor
can the @ operator be applied to a property. The reason is that a property doesn't necessarily exist in memory. It
could, for instance, have a read method that retrieves a value from a database or generates a random value.
