# download: https://golang.org/doc/install

# set Path
export PATH=$PATH:/usr/local/go/bin
export GOROOT=$HOME/go1.X
export PATH=$PATH:$GOROOT/bin

package main

import "fmt"

func main() {
    fmt.Printf("hello, world\n")
}

cd $HOME/go/src/hello
go build

./hello
# output: hello, world