my $date;
if (@ARGV) {
   $date = $ARGV[0];
}

##</code><code>##

my $date = "bar"; 
print "Outside 1 : $date\n";
{ 
     my $date = "foo"; 
     print "Inside : $date\n";
}
print "Outside 2 : $date\n";

##</code><code>##

my $date = $ARGV[0] || yesterday();

sub yesterday {
    my ($yr,$mo,$day) = (localtime( time - 86400 ))[5,4,3];
    return sprintf "%04d%02d%02d",1900+$yr,1+$mo,$day;
}

##</code><code>##

perl -e 'print "How sweet does a rose smell? "; chomp ($n = <STDIN>); $rose = "smells sweet to degree $n"; *other_name = *rose; print "$other_name\n"'