FP in CL is kind of optional, and it's also more in the sense that you can pass functions as arguments or return functions, meaning FP == First Class Functions.

FP in CL is kind of optional, and it's also more in the sense that you can pass functions as arguments or return functions, meaning FP == First Class Functions. But in Clojure, FP is kind of mandatory, there's no OO for example, and it's more than just first-class functions, it's also immutability.