Master Golang: Exit

Use `os.Exit` to immediately exit with a given status.
	package main
	import ( "fmt" "os" )
	func main() {
`defer`s will not be run when using `os.Exit`, so this `fmt.Println` will never be called.	defer fmt.Println("!")
Exit with status 3.	os.Exit(3) }
Note that unlike e.g. C, Go does not use an integer return value from `main` to indicate exit status. If you’d like to exit with a non-zero status you should use `os.Exit`.

If you run `exit.go` using `go run`, the exit will be picked up by `go` and printed.	$ go run exit.go exit status 3
By building and executing a binary you can see the status in the terminal.	$ go build exit.go $ ./exit $ echo $? 3
Note that the `!` from our program never got printed.