title: Can someone explain: (+2 (if (>b a) b a))?
body: <p>Started working through the exercises in <em>Structure and Interpretation of Computer Programs</em> and I'm stuck on this in the first set of exercises.</p>
  
  <pre><code>a=3
  b=4
  (+ 2 (if (&gt; b a) b a))
  </code></pre>
  
  <p>I've looked up the answer: 6  but, working through it myself, I can't figure out how to get that number.</p>
  
  <p>Can someone explain?</p>