golang basic settings

Go language is a concise and efficient open source programming language suitable for applications and network services in various fields. Since its release, Go has become one of the popular languages ​​in web development, system programming, and cloud computing. This article will introduce how to start using the Go language and set up a development environment.

1. Install Go language
   Go is a cross-platform programming language suitable for operating systems such as Windows, MacOS, and Linux. Before you begin, make sure you have the latest version of the Go language installed on your computer.
2. Set environment variables
   After successful installation, you need to configure Go's environment variables to access the Go executable file on your local computer. You can set environment variables by following these steps:

On Windows:

• Search for "Environment Variables" on your computer and select "Edit System Environment Variables";
• Click the "Environment Variables" button and find "Path" under "System Variables";
• Click "Edit" and create a new environment variable, the address is the bin path in the installation package directory.
• Click "OK" and exit the environment variable editing window.

On Linux:

• Open a terminal and enter the following command: sudo nano /etc/profile;
• Add the following at the end of the file: export PATH=$PATH:/usr/local/go/bin;
• Save changes and exit the editor;
• Enter the following command in the terminal to reload the configuration file: source /etc/profile .

On MacOS:

• Enter the following command in the terminal to open the profile file: sudo nano /etc/paths;
• Add the following at the end of the file Content: /usr/local/go/bin;
• Save changes and exit the editor.

3. Install a text editor
   In order to write Go code, you need a text editor. There are many options, you can use command line editors such as Vim and Emacs, or you can use modern editors such as VS Code, Sublime Text, etc. Here, we will use VS Code to write Go.
4. Install Go extension
   In order to facilitate debugging and operation during development, you need to install the Go extension in VS Code. The installation method is as follows:

• Open VS Code and search for "Go extension";
• Select the first search result (usually provided by Microsoft);
• Click the "Install" button to install the extension.

5. Create a Go module
   Before you start writing Go code, you need to create a Go module. This module will serve as a container for all source code and contain useful information about the project. Create a Go module by following these steps:

• Open the terminal and enter the project folder where you want to create the module;
• Enter the following command in the terminal: go mod init <moduleName>;
• In this command, replace <moduleName> with your project’s module name.

6. Create Go source files
   Now you can start writing Go code in VS Code. Create a new folder in VS Code and rename the folder to your project name. In that project folder you need to create a new file called main.go. This file will contain your Go code.

In your main.go file you need to instruct the Go compiler with a declaration of package main, which is the entry point of your program .

7. First Go Program
   The following is a simple Go program example showing how to create your first Go application:

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")
}

In this In the example, import "fmt" imports the fmt Go package. This package allows you to use the formatted output function on the command line to display "Hello, World!".

8. Run Go Program
   In your Go project folder, open a terminal and enter the following command: go run main.go. This command will compile and run your Go code from the command line.

Now you have learned how to set up and use the Go language. Start writing your own code and explore the possibilities offered by this powerful yet concise language.

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