#!usr/bin/perl -w #1
use strict; #2

print "type hw to print hello world script!\n"; #3, newline(s) missing

my $cmd = <STDIN>; #4 STDIN

if ( $cmd eq "hw" ) #5,6,7 $cmd, "=" should be "==" or "eq", "hw" must
+ be quoted
{
print "Hello, world\n"; #3, newline(s) missing
}

else {

print "sorry I didn't understand the command.\n"; #8,3 "Print" -> "pri
+nt", newline(s) missing
}

[download]

I didn't count the missing my as an error, that could have been intended as a global variable instead of a lexical with global scope. I missed the chomp, and I had the \n after the print statements so the buffers get flushed. I'm not sure if Perl autoflushes buffers when alternating between printing to STDOUT and reading from STDIN.

In reply to Re^3: Conditional question by Corion
in thread Conditional question by Mr.Clean

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.