Enumeration (or enum) is a user-defined data type in C that consists of integral constants or integers that are given names by a user. It is mainly used to assign names to integral constants, which makes a program easy to read and maintain. The use of enum in C to name the integer values makes the entire program easy to learn, understand, and maintain by the same or even different programmer.
To define an enum in C, the enum keyword is used, followed by the name of the enum, and the constants within are separated by commas. For example, enum week{Mon, Tue, Wed, Thur, Fri, Sat, Sun}; defines an enum named week with seven constants representing the days of the week.
Enum variables can be created by declaring a variable of the enum type and assigning it a value from the enum. For example, enum week day; day = Wed; assigns the value of Wed to the variable day .
Enums are used when a variable needs to have only a specific set of values. They can also be used in switch statements to check for corresponding values.
