while (1) {
  # use a block for structuring things
  {
     print "do something, then leave the loop\n";
     last;
  }
}
[download]

Of course this coooompletely different to

while (1) {
  # use a block for structuring things (a bit unconventionally)
  if (1) {
     print "do something, then leave the loop\n";
     last;
  }
}
[download]

Do you know what happens here? :-)) It has cost me some time to find out...
Happy xmas to all.