ClassCastException java.lang.Long cannot be cast to clojure.lang.IFn

Question

I have a function that takes the number of years and salary, then recursively doubles the salary until years is exhausted. However, I keep getting this error:

Answer 1

Since you are new I rewrote your function to be a bit more idiomatic. Also, it uses recur so it will not consume the call stack.

(defn calculate-salary
  [years salary]
  (if (zero? years)
    salary
    (recur (dec years) (* salary 2))))

Notice the use of the zero? predicate, recur, and dec

EDIT: typos and grammar