The success/failure of the search for a given IP address will also depend on how you are assigning a value to $address. You say "a user is typing" this value -- are you reading it from STDIN? If so, to you "chomp" the string that you read, to remove the line-termination character(s)?

Maybe you should check for (and remove) leading and trailing whitespace in the user input, which would be a suitable alternative to using chomp: 

print "Enter IP address to locate: ";
$address = <STDIN>;
$address =~ s/^\s*//;
$address =~ s/\s*$//;

[download]
OTOH, if the user is providing the IP address via @ARGV (as a command-line argument), then you don't need to worry about any of that.

In reply to Re: to find an index of a particular value in an array by graff
in thread to find an index of a particular value in an array by s_gaurav1091

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.