title: Count positive elements in list
body: <p>Im trying count the number of positive elements in a list.  Here is what I have so far:</p>
  
  <pre><code> (define howMany
     (lambda (list)
        (cond
           [(not (list? list)) 0]
           [(null? list) 0]
           [(&gt; list 0) (+ 1 (howMany (cdr list)))])))
  </code></pre>
  
  <p>It keeps giving me an error, "expects type real number", how would you fix this?</p>
  
  <p>Oh im calling this like so:</p>
  
  <pre><code>(howMany '(6 7 8))
  </code></pre>