[Yugong series] go teaching course 002 go language environment installation in July 2022

One 、Go Locale installation

Go Language is a compiling language, which needs SDK The toolkit compiles it to run , Second, you need an editing tool to write code , Finally SDK Tool configuration environment variables in , So the summary can include three aspects ：

• SDK Kit installation

• VSCode install

• Environment variable configuration

Go Language supported systems include ：Linux、FreeBSD、Mac OS X（ Also known as  Darwin）、Windows.

When will  Go When the language source code is written, the computer cannot directly execute , You need to use a compiler to compile it into a binary executable , Then we need to use Go Linguistic SDK The kit .

Go Language SDK Installation package download address ：

https://golang.google.cn/dl/

Windows You can use  .msi  suffix ( The file can be found in the download list , Such as go1.18.3.windows-amd64.msi) Installation package to install .

By default  .msi  The files will be installed in  c:\Go  Under the table of contents . You can take  c:\Go\bin  Directory added to Path In the environment variables . After adding, you need to restart the command window to take effect .

Enter the following command to test whether the installation is successful

go version # Output version information
go env # environmental information


Two 、 first Go Program

Go The flow chart of language operation is as follows ：

1. Command line run

Script code test.go as follows ：

package main

import "fmt"

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


Command line run ：

go run test.go


Translate it into exe function

go build test.go ./test.exe


3、 ... and 、Go Language multi version control

occasionally , We will meet with Go Multiple versions of the language , To solve the need to install different versions in different scenarios , It can easily switch between different versions , Here's a recommendation gvm.

gvm yes Go Version Manager , Use  shell  Script development . You can install it according to the file , Reference resources ： 

https://github.com/moovweb/gvm

 .

After installation , We can install other go Version of the .

gvm install go1.17.6
gvm use go1.17.6


After executing the above command, you can add a new version Go ,GOPATH、GOROOT  And other environment variables will be automatically set , Then you can directly use the specified version Go The language .

summary