Dear monks!

I need to round a number up nearest ten, hundred, thousand etc i.e. 7 should be 10, 23 -> 30, 112 -> 120, 1325 -> 1400 ...

So, I've created function to do this convertion: 

sub round_up {
    my $num = shift || die "Please, specify target number!";

    my $length = length($num);
    my $first = substr($num, 0, 1);

    if($length > 2) {
        my $rest = substr($num, 1);
        $num = $first.('0'x($length - 1)) +
                    ((substr($rest, 0, 1) + 1).('0'x(length($rest) - 1
+)));
    } elsif($length == 2) {
        $num = (substr($num, 0, 1) + 1) . ('0'x($length-1));
    } else {
        $num = 10;
    }

    return $num;
}

[download]
This is the fist thing which has came to my mind. I'd like to see your variants of solving of this task. All suggestions will be appreciated.

Thanks in advanced.

---
Michael Stepanov aka nite_man

It's only my opinion and it doesn't have pretensions of absoluteness!

20040928 Edit by Steve_p: Changed title from 'Rounding up nearest ten, handred etc'

In reply to Rounding up nearest ten, hundred etc by nite_man

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.