Introduction

Methods in Go

While technically Go isn’t an Object Oriented Programming language, types and methods allow for an object-oriented style of programming. The big difference is that Go does not support type inheritance (mechanism of acquiring the features and behaviours of a class by another class) but instead has a concept of interface.

In this chapter, we will focus on Go’s use of methods and interfaces.

Note: A frequently asked question is “what is the difference between a function and a method”. A method is a function that has a defined receiver, in OOP terms, a method is a function on an instance of an object.

Go does not have classes. However, you can define methods on struct types.

The method receiver appears in its own argument list between the func keyword and the method name. Here is an example with a User struct containing two fields: FirstName and LastName of string type.

Example​