Golang check required apps

check-required-apps.go

requiredPrograms := []string{"nc", "ls", "bash", "mkdir"}
	var requiredapps [4]bool
	for i, s := range requiredPrograms {
		// Get path of required programs
		path, err := exec.LookPath(s)
		if err == nil {
			fmt.Printf("Required program %v %v found at %v\n", i+1, s, path)
			requiredapps[i] = true //save to array
		} else {
			fmt.Printf("Required program %v %v cannot found.\n", i+1, s)
			requiredapps[i] = false
			if i < 4 { //sh and df is must required. If is not found in software than exit.
				fmt.Printf("Please install %v and run this program again\n", s)
				os.Exit(3)
			}
		}
	}