title: How to find the average value of an array - Swift
body: <p>I'm having a problem where I don't know how to find the average value of an array. Here are my questions:</p>
  
  <ol>
  <li>How do I add up all the numbers within my array?</li>
  <li>How do I find how many indexes are in my array?</li>
  <li>How do I take this information and gather the average value from my array?</li>
  </ol>
  
  <p>While all of these may seem simple and fairly elementary, I am unsure on how to do this. Any help?</p>