An article explaining the methods in Golang in detail

Golang (also known as Go) is a concurrent programming language developed by Google. Golang is popular because its code is concise, easy to read, and can handle high concurrency. A Golang program contains functions and methods when written. This article will focus on Golang methods.

Methods are a key part of object-oriented programming, and they are defined in data types. A method consists of a series of statements and instructions, which are encapsulated within a function. These methods are only executed when the object they belong to is created, initialized and called. Methods are similar to functions, but they are executed within the type.

Method syntax

In Golang, the syntax for method definition is as follows:

func (t Type) methodName(parameter list)
{  
   // method body  
}

In this syntax, t represents the type, methodName is the method name. Next, the method body is placed inside curly braces.

Let's look at some examples:

type Employee struct {
name string  
age int  
}

func (emp Employee) displayEmployee() {
fmt.Printf("Name:%s Age:%d", emp.name, emp.age)  
}

func main() {
emp1 := Employee{  
     name: "Jack",  
     age: 24,   
}  
emp1.displayEmployee() //调用 displayEmployee() 方法  
}

In this program, we define a type Employee and a method named displayEmployee(), which will display the contents of the Employee object.

The difference between functions and methods

In Golang, there are some fundamental differences between functions and methods. Here are a few key differences:

1. Functions are self-contained blocks of code that accept a value and return a result. Methods are defined in types, and they are usually executed in the form of calling objects.
2. In a function, we can use all variables and constants, but in a method we can only use the member variables and constants of the current object.
3. Methods are defined in type definitions, so the same method name may have different implementations between different types. Functions are defined in the main function or other similar functions.

Methods are important because they make objects more flexible and extensible when used. When programming in Golang, it is very necessary to understand and master the methods.

In the above introduction, we already know the key differences between the syntax of Golang methods and functions/methods. Like other programming languages, Golang method is a very important concept in object-oriented programming, which helps us better organize and process code. In subsequent studies, we will learn more methods to expand the capabilities and strength of Golang.

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