title: combining two string variables
body: <p>I'm a novice Python user trying to do something that I think should be simple but can't figure it out.  I've got 2 variables defined:</p>
  
  <pre><code>a = 'lemon'
  b = 'lime'
  </code></pre>
  
  <p>Can someone tell me how to combine these in a new variable?</p>
  
  <p>If I try:</p>
  
  <pre><code>&gt;&gt;&gt; soda = "a" + "b"
  &gt;&gt;&gt; soda
  'ab'
  </code></pre>
  
  <p>I want soda to be <code>'lemonlime'</code>. How is this done?</p>
  
  <p>Thanks!</p>