main 함수에서 fmt.Println() 함수를 실행하면 String() 메서드에서 지정한 문자열이 출력된다.

func main() {
    shirt := Item{"Men's Slim-Fit Shirt", 25000, 3}
    video := Rental{"Interstellar", 1000, 3, Days}
    eventShoes := DiscountItem{
        Item{"Women's Walking Shoes", 50000, 3},
        10.00,
    }
    items := Items{shirt, video, eventShoes}
 
    fmt.Println(shirt)
    fmt.Println(video)
    fmt.Println(eventShoes)
    fmt.Println(items)
}

실행 결과

[Men's Slim-Fit Shirt] 75000
[Interstellar] 3000
[Women's Walking Shoes] 150000 => 135000(10% DC)
3 items. total: 213000
- [Men's Slim-Fit Shirt] 75000
- [Interstellar] 3000
- [Women's Walking Shoes] 150000 => 135000(10% DC)