I have properly experienced the reality of functional programming that I had only encountered in theory. I still lack the skills, so I code in an ordinary imperative manner, but after watching this lecture, I naturally increased the frequency of using higher-order functions or separating pure functions, and I think the quality of my code has improved a lot. If I have the chance, I would like to experience Haskell or other functional programming languages that are often mentioned in the lecture. I am learning a lot. Thank you for the great lecture.