Để in danh sách ngăn cách bằng dấu phẩy, cách ngắn gọn là tùy chọn in dấu phẩy trước mỗi phần tử.
Why read it: Lập trình viên nên đọc bài này để hiểu cách tối ưu hóa và viết code ngắn gọn khi in danh sách, giúp tiết kiệm thời gian và tránh lỗi khi xử lý các trường hợp đầu/đầu cuối trong các vòng lặp.
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