Clojure REPL Unable to resolve symbol

Question

When executing this function from lein run, the program executes as expected. But I am trying out atom.io's proto-repl package and when I call the function using the proto-repl, it gives a "CompilerException java.lang.RuntimeException: Unable to resolve symbol: can-vote in this context." Here is my function:

(defn can-vote
  []
   (println "Enter age: ")
   (let [age (read-line)]
    (let [new-age (read-string age)]
     (if (< new-age 18) (println "Not old enough")))
      (println "Yay! You can vote")))

Answer 1

When your repl starts, it likely puts you in the user namespace. You either need to move to your clojure-noob.core namespace or call it with the fully qualified symbol.

If you want to switch namespaces

(ns clojure-noob.core) ;; switch to the correct namespace
(can-vote) ;; call the function

If you want to call it with the fully qualified symbol from the user namespace

(require 'clojure-noob.core) ;; first require the namespace
(clojure-noob.core/can-vote) ;; call the fully qualified function

You can read much more about namespaces and calling functions from other namespaces and libraries here.