I am a semi-major in information and communication engineering, but I applied for a liberal arts degree and failed to get good grades in programming-related classes, so I had no interest in coding at all. Then, after finishing my second year, I felt a sense of crisis about getting a job, so I decided to study coding properly, so I took a leave of absence from school this year and joined a coding club to study coding. I was anxious about how to study, so I paid for this and that lecture, but I couldn't finish it. Since coding was a completely different world from what I had studied before, I think my anxiety got me caught up in lectures with more provocative titles. That's why I hesitated a lot about paying for this lecture, but I paid because I was drawn in by the introduction that it would be a great coach. In fact, this book is a really good lecture that gathers fragmented information and feeds it to beginners like me. I think the remaining task for those who have watched this lecture is practice. No matter how good a coach is, if the athlete doesn't run, it's meaningless. I think it's my turn to run now. I will no longer be dazzled by too much information and will work hard based on this lecture. I hope that many beginners in programming who are watching this lecture will study hard based on the information here and get the job they want.