go_hello_sample.txt

Southpaw:~ philip$ export GOPATH="/Users/philip/scratch/gobook"; export PATH=${GOPATH}/bin:${PATH}
Southpaw:~ philip$ mkdir -p $GOPATH/src/hello
Southpaw:~ philip$ vi $GOPATH/src/hello/hello.go


// source:
package main

import (
	"fmt"
	"os"
)

func main() {
	fmt.Println("Contents of os.Args[0]:", os.Args[0])
}
// end source

Southpaw:~ philip$ go install hello

Southpaw:~ philip$ hello
Contents of os.Args[0]: hello

Southpaw:~ philip$ $GOPATH/bin/hello
Contents of os.Args[0]: /Users/philip/scratch/gobook/bin/hello