Roger that.

In even more other words, you don't actually get a Ctrl-D character (the OS eats it); instead you will see EOF, which is a testable condition embodied by the <> operator returning undef. Here's the same example again using the implicit $_ variable:

while (<>) {
  chomp;

  #do stuff (with $_)
}
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dmm

You can give a man a fish and feed him for a day ...
Or, you can teach him to fish and feed him for a lifetime