title: What is the smallest positive floating point value?
body: <p>How can I express a number in Objective-C "infinitely" close to zero but still larger. Essentially I want the smallest positive number.</p>
  
  <p>I want to express the number, <code>.0000000000000001</code> in a simpler form.</p>
  
  <p>What's the smallest number I can get without it being zero?</p>