title: Get the version of TCL from the command-line?
body: <p>I'm looking for a very straight-forward way of getting the version of the TCL installed on a machine from the command-line. For most programming languages, something along the lines of</p>
  
  <pre><code>languagename -v
  </code></pre>
  
  <p>provides the information that I want. This does not seem to be an option for <code>tclsh</code>.</p>
  
  <p>The <a href="http://www.faqs.org/faqs/tcl-faq/usage/">TCL FAQ Q.B21</a> suggests</p>
  
  <pre><code>echo 'puts $tcl_version;exit 0' | tclsh
  </code></pre>
  
  <p>but I wonder if there is anything more straight-forward and cross-platform? (I suspect that this would fail mightily on a Microsoft Operating System.)</p>
  
  <p>--</p>
  
  <p><em>EDIT: Just to emphasize that I'm looking for something that can be executed directly from the operating system command-line. There's all kinds of information available once you start <code>tclsh</code>, but I'm trying to avoid that to ease automated discovery.</em> </p>