This is rather odd looking code for a number of reasons.

First it is very odd for the "for loop" variable, in this case, $i to have scope outside of the for loop. Normally these things are coded as:  for (my $i=0; $i <=100; $i++){} #after the "for loop", $i has no scope.

But as another point, in Perl, C Style "for loops" themselves are rare. Usually better coded as for my $i (0..100){}. These C style for loops are very error prone critters, due to the "off by one" errors that can happen.

In this case, there is of course no need to check for $i==100 within the loop. That only happens on the last loop iteration. So this is the same thing: 

my $i;
for ($i = 0; $i <=100; $i++)
{
    statements ...    
}
$i = 200 if defined ($v); #same thing as your code
                          #$i is 101 here, but it was
                          #100 on last loop iteration
                          #test can be moved outside of the loop

[download]
However there is a big problem with this optional definition of a variable, $v. I don't see how that works? Please show your proposed code for that. I think that you should define $v and then check if 0/1 false or non zero? I am not sure from the requirements exactly what you intend.

In reply to Re: Incrementing the loop again. by Marshall
in thread Incrementing the loop again. by Anonymous Monk

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.