Enum
An enum (short for enumeration) is a value type that represents a set of named constants. Enums are useful when you want to define a finite set of possible values for a variable, such as the days of the week or the different colors in a traffic light.
Here’s an example of how to define an enum in C#:
public enum DaysOfWeek
{
Monday,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
Sunday
}
In this example, we define an enum called “DaysOfWeek” that contains seven named constants: “Monday”, “Tuesday”, “Wednesday”, “Thursday”, “Friday”, “Saturday”, and “Sunday”. Each of these constants is assigned an integer value by default, starting with 0 for the first constant and incrementing by 1 for each subsequent constant.
To use an enum in C#, you can declare a variable of the enum type and assign one of the named constants to it. For example:
DaysOfWeek today = DaysOfWeek.Monday;
In this example, we declare a variable called “today” of the “DaysOfWeek” type and assign it the value of the “Monday” constant.
Enums are useful because they provide a way to define a finite set of possible values for a variable, which can help make your code more readable and self-documenting. They also provide a type-safe way to work with these values, since the compiler will check that any values assigned to an enum variable are valid constants defined by the enum.
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