Enum Definition

Enum is a Java programming language and is a user-defined special data type in C. Enum data type allows for a variable to be a set of predefined constants. It is a special class.

Enum, a short form of enumeration, is generally used to assign names to integral / a fixed set of constants. Enum can be used when the values are not going to change. To exemplify, such values can be the name of a country, a very famous person, a particular month, a particular day, or color.

Features of Enum

• Enum is informative as far as the printed values are concerned.
• Enum has been classified as or known as Typesafe.
• Enum is user-friendly as the set of constants is not required to stay fixed for all time.
• This Java programming language acts like a class

Merits or Benefits of Enum

• It is beneficial as it reduces errors that may be resulted from wrong typing (like in the case of the name of a month).
• Spelling mistakes cannot take place
• Enum is particularly useful as it simplifies to change values in the future.
• Since it makes code easier to read, the chances of errors happening is very minimum
• It has good filtering speed 

Demerits of Enum

• Enum is not a generalized Java programming language. It cannot be used in all classes.
• It has limitations as far as the factor of Coding Constraints is concerned.
• Scope of Enum is very limited
• Since type of enum is not defined, it creates a problem

The Conclusion:

Enum is used in creating menus. In Java format, it is represented using specified Enum data type in which Variables must match the predefined constants.