Setting an environment variable in Go

main.go

package main

import (
    "fmt"
    "os"
)

func main() {
    // Set the USERNAME environment variable to "MattDaemon"
    os.Setenv("USERNAME", "MattDaemon")

    // Get the USERNAME environment variable
    username := os.Getenv("USERNAME")

    // Prints out username environment variable
    fmt.Print(username)
}