title: Arithmetic operations inside templates
body: <p>I'm trying to add a number to a parameter inside a puppet template as below</p>
  
  <pre><code>"https://localhost:&lt;%= 9443 + @offset %&gt;/service/" 
  </code></pre>
  
  <p>This gives me the following error.</p>
  
  <p>Detail: String can't be coerced into Fixnum</p>
  
  <p>'offset' is a numeric value. Is it possible to do this kind of arithmetic operations in puppet?</p>