After finishing the first year of college, I felt that I was lacking in learning the C language, so I took the course at the recommendation of people around me. At first, I was afraid to start while watching the lecture, but I decided to give it a try. Since I had already learned the C language grammar at school, I was able to get through it without much trouble at first, but as I listened to the lecture, I began to see things I didn't know about one by one. For example, there is a concept called 'buffer' in the C language, but I didn't learn how to clear this buffer at school, so I was able to learn these little things. After listening to the lecture, I was able to learn more about the C language.