This should be very easy and yet I am stuck. 
#!/usr/bin/env perl

use strict;
use warnings;
use utf8;
use feature 'say';
use File::Copy;

my %j = (
1 => 'vimplugins',
2 => "vimwiki",
3 => "vim",
4 => "bash",
5 => "latex",
6 => "perl",
7 => "regex",
8 => "git",
9 => "gnupg",
10 => "nmap",
11 => "tmux",
12 => "csssnippets",
13 => "htmlsnippets",
14 => "latexsnippets",
15 => "markdownsnippets",
16 => "perlsnippets",
17 => "vimsnippets",
);
my $number = <STDIN>;
say $number;

my $x = $j{$number};
say $x;
say "done";

[download]
I get the error message:" Use of uninitialized value $x in say". It doens't make sense to me.

In reply to Easy hash question (uninitialized value) by WisDomSeeKer34

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.