/**
 <doc>
 <p>Neko uses <i>null</i> for undefined variables,
  and also as a programmer accessible value.</p>
 <p>The <i>null</i> value can be treated as a boolean value with the
  builtin $istrue, and tests as false.</p>
 </doc>
*/

var n = null
if n == null $print("n is null\n")
if $not($istrue(n)) $print("and tests as boolean false\n")