Do interfaces in Go language have to be capitalized?

Go language interfaces do not need to be capitalized, but it is recommended that the interface name be large. The reasons are: 1. The visibility of the interface depends on whether its definition is outside the package or within the package; 2. Capitalized interface names It is easier to be imported and used by other packages, improving the usability and readability of the package; 3. The uppercase interface name is also more in line with the conventions of the Go language, making the code easier to understand and maintain.

The operating environment of this tutorial: windows10 system, golang1.16.5 version, DELL G3 computer.

Go language is a static language with high development efficiency and superior performance. It has concise syntax and powerful concurrency support. In Go language, interface is an important feature used to achieve polymorphism and encapsulation. However, a common question is, must the interface of the Go language be capitalized?

In the Go language, an interface is a collection of methods through which the behavior of an object is defined. An interface is a type that objects can use by implementing this interface. In the Go language, the name of an interface consists of the names of all its methods, ending with "er".

In the Go language, the visibility of an identifier is determined by the case of the first letter. Identifiers starting with an uppercase letter are visible outside the package, while identifiers starting with a lowercase letter are visible only inside the package.

According to this rule, the name of the Go language interface can be in uppercase or lowercase, and there is no mandatory rule. The visibility of an interface depends on whether it is defined outside or inside a package.

However, according to Go language best practices, it is recommended to capitalize the name of the interface. This is because uppercase interface names are easier to import and use by other packages, improving the usability and readability of the package. In addition, uppercase interface names are more in line with the conventions of the Go language, making the code easier to understand and maintain.

When we define an interface, it is recommended to add a descriptive prefix in front of the name to better reflect the purpose and functionality of the interface. For example, if we define an interface for database operations, we can name it "DB Operation Interface", or use a more specific name such as "UserDB Operation Interface".

It should also be noted that the interface methods should also be named according to the naming convention of the Go language, that is, the first letter is capitalized. In this way, the methods in the structure that implements the interface will also be automatically changed to uppercase, ensuring that the methods of the interface can be called correctly in other packages.

In summary, Go language interfaces can be case-sensitive, but according to best practices, it is recommended to capitalize the name of the interface. This improves the usability and readability of the code and conforms to the conventions of the Go language. In addition, the methods of the interface should also be named according to the naming convention to ensure that the methods of the interface are correctly called in other packages.

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