What does AN mean in UNCLASSIFIED

AN stands for "Ada Name" and is used to declare an enumeration type. An enumeration type is a user-defined data type that consists of a set of named values, called enumerators.

To declare an enumeration type, you can use the following syntax:

type enumeration_type_name is (enumerator_list);

where enumeration_type_name is the name of the enumeration type, and enumerator_list is a comma-separated list of the enumerators.

Using enumeration types in Ada offers several advantages, including:

• Improved readability: Enumeration types make code more readable and self-documenting by providing meaningful names to constants.
• Reduced errors: By using enumeration types, you can avoid errors caused by using incorrect or inconsistent values.
• Enhanced safety: Enumeration types can help prevent unintended assignments or comparisons of incompatible values.

Yes, you can assign values to enumerators in Ada using the following syntax:

enumerator_name : constant_expression;

This allows you to specify the underlying value associated with each enumerator.

You can use enumeration types in Ada in various ways, including:

• As data types: Enumeration types can be used as data types for variables, parameters, and return values.
• For case statements: You can use enumeration types to control the flow of execution in case statements.
• For subtyping: You can create subtypes of enumeration types to further restrict the set of allowed values.