This article demonstrates an example of how the GO language gets system environment variables. Share with you for your reference. The specific implementation method is as follows:

package main
import (
 "fmt"
 "os"  // We're going to use os In the package env
)
func main() {
 //os.Getenv Retrieve the environment variable and return the value, which would be empty if the variable did not exist.
 HOME:= os.Getenv("HOME")
 fmt.Println(HOME)
 fmt.Printf(os.Getenv("JAVA_HOME"))
}

I hope this article has been helpful to your programming of Go language.