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Unit-15.md

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Enums

An enum is a special type that represents a group of constants (unchangeable values).

enum Level {
  LOW,
  MEDIUM,
  HIGH
};

To access the enum,  we must create a variable of it.

Inside the main() method, specify the enum keyword, followed by the name of the enum (Level) and then the name of the enum variable (myVar in this example):

enum Level myVar;

assign value to the defined enum var.

enum Level myVar = MEDIUM; // The value must be inside the enum

By default, the first item (LOW) has the value 0, the second (MEDIUM) has the value 1, etc.

We can manually change the value of enums by  them.

enum Level {
  LOW = 25,
  MEDIUM = 50,
  HIGH = 75
};

Note that if you assign a value to one specific item, the next items will update their numbers accordingly:

enum Level {
  LOW = 5,
  MEDIUM, // Now 6
  HIGH // Now 7
};

use case : Use enums when you have values that you know aren't going to change, like month days, days, colors, deck of cards, etc.