ehm ... he's using goto as loop control, last, next and redo are not much different.

Than you don't print the $msg before first run like he did.

Considering "cleanest" and "DRYest" flow control , I'd rather try this

> perl

$max_length=5;

OUTER: {
    print "Input max is $max_length!!!\n";
    while (1) {

        chomp( $input = <STDIN> );

        last OUTER
          if lc( $input )    eq "end";
        redo OUTER
          if length( $input ) > $max_length;

        print "- $input is OK\n";

    }  
}

__END__
Input max is 5!!!
1
- 1 is OK
12345
- 12345 is OK
123456
Input max is 5!!!
123
- 123 is OK
end
>

[download]

YMMV! :)

update

please note that the more verbose 

OUTER: 
  while(1) {
     ...

[download]

works equally well and might be less surprising for some maintainers. :)

Cheers Rolf

(addicted to the Perl Programming Language)

In reply to Re^2: do until loop breaks before meeting the condition by LanX
in thread do until loop breaks before meeting the condition by thanos1983

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