• `package` is how Go organizes code into reusable units.
• `import` lets you use code from other packages.

• Organize code by folders/modules.
• Reuse logic across your project.

package main
 
import "fmt"
 
func main() {
    fmt.Println("Hello")
}

• `package main` + `func main()` is the program entry point.
• Names starting with an uppercase letter (e.g. `Println`) are exported (public).

• organize /ˈɔːrɡənaɪz/: tổ chức
• reuse /ˌriːˈjuːz/: tái sử dụng
• entry point /ˈentri pɔɪnt/: điểm bắt đầu chạy
• exported /ɪkˈspɔːrtɪd/: public (truy cập từ package khác)