C# - Enums

An enumeration is a set of named integer constants. An enumerated type is declared using the enum keyword.

C# enumerations are value data type. In other words, enumeration contains its own values and cannot inherit or cannot pass inheritance.

Declaring enum Variable

The general syntax for declaring an enumeration is −

enum <enum_name> {
   enumeration pst 
};

Where,

The enum_name specifies the enumeration type name.

The enumeration pst is a comma-separated pst of identifiers.

Each of the symbols in the enumeration pst stands for an integer value, one greater than the symbol that precedes it. By default, the value of the first enumeration symbol is 0. For example −

enum Days { Sun, Mon, tue, Wed, thu, Fri, Sat };

Example

The following example demonstrates use of enum variable −

using System;

namespace EnumApppcation {
   class EnumProgram {
      enum Days { Sun, Mon, tue, Wed, thu, Fri, Sat };

      static void Main(string[] args) {
         int WeekdayStart = (int)Days.Mon;
         int WeekdayEnd = (int)Days.Fri;
         
         Console.WriteLine("Monday: {0}", WeekdayStart);
         Console.WriteLine("Friday: {0}", WeekdayEnd);
         Console.ReadKey();
      }
   }
}

Monday: 1
Friday: 5