package greetings

import "fmt"
import "errors"

// Hello returns a greeting for the named person.
func Hello(name string) string {
   // If no name was given, return an error with a message.
    if name == "" {
        return "", errors.New("empty name")
    }
    // Return a greeting that embeds the name in a message.
    message := fmt.Sprintf("Hi, %v. Welcome!", name)
    return message
}