golang installation and testing

In recent years, Golang (or Go language) has been hailed as a new generation of efficient programming language. It has the advantages of high concurrency, excellent memory management, fast compilation speed, and easy to learn and use. Therefore, more and more developers are beginning to pay attention to and use Golang. This article aims to provide you with an installation and testing guide for Golang, hoping to be helpful to Golang beginners.

1. Environment preparation

Before you start, you need to confirm whether the following environment is fully prepared:

1. Operating system: Windows, Mac or Linux, etc.
2. System number: Golang supports 32-bit and 64-bit systems. When selecting the installation package, please choose to download according to the number of bits of your system.
3. Network environment: You need to ensure a smooth network in order to download the Golang installation package from the official website.

2. Golang installation

1. Download Golang

You can download it from the Golang official website (https://golang.org/dl/) Download the Golang installation package. Select the appropriate installation package to download based on your operating system and system bitrate. It is recommended to download the latest version.

2. Installing Golang

Windows system

After the download is complete, double-click the installation package and follow the prompts on the boot interface to install. By default, Golang will be installed in the root directory of drive C. You can customize the installation path, but please make sure there is no existing Golang folder in this path.

Mac and Linux systems

You can install directly using the terminal. Open the terminal and enter the directory you want to install, such as the /usr/local/ directory. The terminal command is as follows:

$ cd /usr/local/

Then, download through the wget command Corresponding Golang installation package:

$ wget https://golang.org/dl/go1.17.1.linux-amd64.tar.gz

After downloading, use the tar command to decompress and install Package:

$ tar -xzvf go1.17.1.linux-amd64.tar.gz

Finally, add Golang’s bin directory to the path environment variable:

$ export PATH=$PATH:/usr/local/go/bin

3. Test Golang

After the installation is complete, you can perform the following tests to ensure that Golang has been successfully installed:

1. Switch to the bin directory under the Golang installation directory:

$ cd /usr/local/go/bin

2. Run the following command:

$ go version

If you see the version number of Golang, congratulations, you have successfully installed Golang!

4. Write a Hello World program

Next, we can try to write a Hello World program in Golang to become familiar with Golang’s programming syntax:

1. Create A hello.go file for writing programs:

$ vim hello.go

2. In the hello.go file, write the following code:

package main

import "fmt"

func main() {

fmt.Println("Hello, World!")

}

3. Save and exit the editor.
4. Run the following command in the terminal to run the program:

$ go run hello.go

If everything is OK, you will see "Hello, World! "This output result.

5. Summary

Through the guidance of this article, you have successfully installed and tested Golang, and have written your first program. Next, through more learning and practice, you can deeply master the Golang programming language and apply it to your actual projects.

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