title: Clojure Hello World - "No such namespace" error
body: <p>I'm trying to write a helloworld with clojure. I'm using leinengen with emacs and swank-clojure.</p>
  
  <p>Here's what my <code>src/hello.clj</code> contains:</p>
  
  <pre><code>(ns hello)
  
  (defn hello []  
  (println "Hello World"))
  </code></pre>
  
  <p>When I <code>clojure-jack-in</code> and <code>C-c C-c</code> over the function, I get:</p>
  
  <pre><code>No such namespace: hello                                                   
  [Thrown class java.lang.Exception]  
  </code></pre>
  
  <p>What am I doing wrong? </p>