golang scan from stdin in a loop

main.go

package main

import (
	"bufio"
	"os"
)

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for {
		if scanner.Scan() {
			switch scanner.Text() {
			case "hi":
				println("hello")
			case "exit":
				os.Exit(0)
			}
		}
	}
}