What is the purpose of using enumeration?

In Go language, enumerations can be defined as a new type by a collection of constants. Enumerated types have a fixed range of values, which can improve code readability and maintainability. The definition of an enumeration type is similar to that of constants, but in an enumerated type, iota can be used to automatically generate consecutive values.

The main purposes of enumerations are as follows:

1. The range of constant values is limited to the enumerated type, preventing users from assigning incorrect values.
2. Improving code readability can be achieved by giving meaningful names to enum values, making it easier to understand the code.
3. The code can be simplified by reducing the need for checking value ranges, thereby reducing the likelihood of logical errors.
4. Using enumerated values in a switch statement can improve the maintainability and scalability of the code.

In conclusion, enums can help programmers better manage constant values, improving the readability and maintainability of the code.