I have been learning C language up until now, but I have always just been superficially familiar with it. So, I could use simple functions and pointers, but when I got a little deeper, I didn't know what to do, and it was better to not know anything at all. Then, I had the opportunity to learn Infraon's Mr. Tta-bae's lecture, and now I know it to some extent. Mr. Tta-bae's lecture was really deep and broad. He guided me to understand difficult content with easy explanations and examples, so I found myself learning more and more deeply, not just superficially. I also really liked the fact that he briefly mentioned the content to be learned first, so that I could learn the content that would come later without any resistance. If you think you know C language superficially or don't know anything, but want to learn it deeply and definitely once you learn it, I highly recommend this lecture.