Say what? That's the same as this:
$argument = undef;
while (0)
{
}
This is the noise you'll be making when you try and run that program: "ARVG! ARVG!"
Remember, when pushing buttons on the keyboard, it is important to hit them in the right order. Must be one of those late nights/early mornings?
I think what you meant was:
$|++;
my $argument = $ARGV[0] || warn "No argument given\n";
do
{
print "Enter an argument: ";
chomp ($argument = <STDIN>);
} while (!length($argument));
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