title: about ruby range?
body: <p>like this</p>
  
  <pre><code>range = (0..10)
  </code></pre>
  
  <p>how can I get number like this:</p>
  
  <pre><code>0 5 10 
  </code></pre>
  
  <p>plus five every time but less than 10</p>
  
  <p>if range = (0..20) then i should get this:</p>
  
  <pre><code>0 5 10 15 20
  </code></pre>