Thank you for your valuable review, Min Jun-soo! Kotlin supports functional programming more naturally. You can write more readable and manageable code by using its simple grammar, support for immutability, and easier use of higher-order functions. I think you will enjoy writing test code more if you apply parts like kotest used in the sample code of the lecture to your work. If you have any other questions, please feel free to ask me anytime! 🚀 Thank you so much for your valuable review. 😆