I took other offline classes, but I only understood the definitions and concepts, and it was difficult to grasp the overall framework of programming. The lectures were mostly focused on the functions themselves, and I felt the same way when I looked at the book, and as I studied, I had a lot of questions like, "Where can I use this? How can I use this after learning it?" Then, I took Kim Young-han's lecture, and most of the questions I had were answered and resolved whenever a new concept came up. In addition, through explanations in a way that is directly related to practice, appropriate examples, and problem solving, I was able to clearly explain how the concepts I am learning are used in the overall framework of programming and how they can be applied, so I was able to clearly define the purpose of taking this lecture. Thank you for the great lecture.