title: How do I set the floating point precision in Perl?
body: <p>Is there a way to set a Perl script's floating point precision (to 3 digits), without having to change it specifically for every variable?</p>
  
  <p>Something similar to TCL's:</p>
  
  <pre><code>global tcl_precision
  set tcl_precision 3
  </code></pre>