title: Error in Bash script arithmetic syntax
body: <p>Script:</p>
  
  <pre><code>#!/bin/bash
  vpct=5.3 
  echo $((vpct*15))    
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>./abc.sh: line 5: 5.3: syntax error: invalid arithmetic operator (error token is ".3")
  </code></pre>
  
  <p>I know I don't need a script to multiply <code>5.3 * 15</code>, but this small script to single out the error. Please advise.</p>