The tokens __END__ and __DATA__ may be used to indicate
       the logical end of the script before the actual end of
       file.  Any following text is ignored, but may be read via
       a DATA filehandle: main::DATA for __END__, or
       PACKNAME::DATA (where PACKNAME is the current package) for
       __DATA__.

##</code><code>##

#!perl
while (<DATA>) {
  print;
}
__END__
Hello, world!

##</code><code>##

Hello, world!