title: clojure with multiple if statements
body: <p>when I call the math() function, to "times", the REPL returns nil. when I use "add", it works fine... help!</p>
  
  <pre><code>(defn math [opr x y ]
      (if(= opr "times")
          (* x y)
      )
      (if(= opr "add")
          (+ x y)
      )
  )
  (math "times" 8 8)
  </code></pre>