First, this 
elsif($length == 2) {
        $num = (substr($num, 0, 1) + 1) . ('0'x($length-1));
}

[download]
could be 
elsif($length == 2) {
        $num = (substr($num, 0, 1) + 1) . '0';
}

[download]
or even 
elseif($length == 2){
    $num = int($num/10) * 10;
}

[download]
since $length is known to be 2.

But I am confused. In your example numbers of 1, 2 and 3 digits round to the nearest 10 and numbers of 4 digits round to the nearest 100. Could you please be more explicit about when to round to what?

In reply to Re: Rounding up nearest ten, hundred etc by traveler
in thread Rounding up nearest ten, hundred etc by nite_man

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