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C# Enums
An enum is a special "class" that represents a group of constants (unchangeable/read-only variables).
To create an enum, use the enum keyword (instead of a class or visual interface), and comma-separate objects:
Example
enum Level
{
Low,
Medium,
High
}
Level myVar = Level.Medium;
Console.WriteLine(myVar);Enum inside a Class
You can also have an enum within the class:
Example
class Program
{
enum Level
{
Low,
Medium,
High
}
static void Main(string[] args)
{
Level myVar = Level.Medium;
Console.WriteLine(myVar);
}
}Enum Values
By default, the first enum item has a value of 0. The second one has a value of 1, and so on.
To get the full value of an item, you must explicitly convert the item into an int:
Example
enum Months
{
January, // 0
February, // 1
March, // 2
April, // 3
May, // 4
June, // 5
July // 6
}
static void Main(string[] args)
{
int myNum = (int) Months.April;
Console.WriteLine(myNum);
}You can also share your enum values, and the following items will update the number accordingly:
Example
enum Months
{
January, // 0
February, // 1
March=6, // 6
April, // 7
May, // 8
June, // 9
July // 10
}
static void Main(string[] args)
{
int myNum = (int) Months.April;
Console.WriteLine(myNum);
}Enum in a Switch Statement
Enums are commonly used in switch statements to check the corresponding prices:
Example
enum Level
{
Low,
Medium,
High
}
static void Main(string[] args)
{
Level myVar = Level.Medium;
switch(myVar)
{
case Level.Low:
Console.WriteLine("Low level");
break;
case Level.Medium:
Console.WriteLine("Medium level");
break;
case Level.High:
Console.WriteLine("High level");
break;
}
}