TIMTOWTDI (though sprintf is faster):

sub pad_zeros {    
    my $optimal_length = 5;
    my $num = shift;
    $num =~s/^(\d+)$/("0"x($optimal_length-length$1)).$1/e;
    return $num;
}

[download]

Cheers,
Ovid

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In reply to (Ovid) Re: front-pad a number with zero's by Ovid
in thread front-pad a number with zero's by deprecated

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