こういう書き方って一般的なのかどうか知りたいです

hello.go

package main
 
import (
	"fmt"
	"errors"
)
 
func hoge() (string, error) {
	return "hello", errors.New("hello err")
}
 
func fuga() (string, error) {
	return "world", errors.New("world err")
}
 
var (
	GREET, G_ERR = hoge()
	WORD, W_ERR = fuga()
)
 
func init() {
	if G_ERR != nil {
		GREET = "bye"
	}
 
	if W_ERR != nil {
		WORD = "Tom"
	}
}
 
func main() {
	fmt.Printf("%s, %s\n", GREET, WORD)
	// => bye, Tom
}