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Ở trong bài hôm nay chúng ta sẽ cùng tìm hiểu hai khái niệm biến cục bộ (local) và biến toàn cục (global) . Cụ thể sẽ đi tìm hiểu phạm vi của từng loại biến, các lưu ý của chúng và điểm khác nhau như thế nào và khi nào nên dùng để ứng dụng tối đa hiệu quả của chúng. Các bạn có thể xem chi tiết những điềutrên ở video mình chia sẻ bên dưới: