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    <p>FWIW, here is how I would write this program:</p> <pre><code>def ask(prompt) print "#{prompt} " gets.chomp end def myreverse(s) s.reverse end def mywordreverse(s) s.split(' ').reverse.join(' ') end def choose(s,option) case option when 1 then puts myreverse(s) when 2 then puts mywordreverse(s) when 3 then puts "hello" else puts "You gave me #{option}; I don't know what to do with that." end end $stdout.sync str = ask("Write a string to reverse: ") option = ask("Choose an option:\n1: Reverse string\n2: Reverse String words\n&gt;") choose(str,option.to_i) </code></pre> <p>Notes:</p> <ol> <li>The last expression in a method <em>is</em> the return value; using <code>return</code> is almost never needed or desirable in Ruby.</li> <li>There exist built-in methods for reversing strings and arrays. (I understand if you are doing this for an exercise.)</li> <li><p>It is cumbersome to iterate arrays or strings in Ruby using <code>for</code>. Instead, you should use</p> <pre class="lang-ruby prettyprint-override"><code>my_str.each_char do |char| # use the single-character string `char` here end my_array.each do |item| # use the item here end </code></pre></li> <li><p>You can use <code>$stdout.sync</code> to force output to always be flushed.</p></li> <li>You need to use <code>chomp</code> on your string to remove the trailing newline always included when the user presses Enter.</li> <li>As pointed out by @robbrit, the core of your problem is that the return value of <code>gets</code> is a String, and you are comparing it to a Fixnum. I've used <code>to_i</code> in my code above to convert the string to an integer for comparison.</li> <li>I've used <code>puts</code> instead of <code>print</code> for the output so that I get a newline at the end and do not leave the user with their next command prompt on the same line as the output.</li> </ol>
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    1. COHi Phrogz, I actually thought i knew my answer, but i am so fond of yours, that i will stick with it. My first problem was that comparison 1 === "1" is actually false. My second problem was that chomp, which was missing, and that one took me a hard time. I actually got there by checking the length of my option string. As for point 2, and 3, you have a keen eye :-). I created these ones to support an interview process, abstract to the language, so i answered it the most low-level/nearer to C way. In each language (and i like ruby more and more btw ) there will be different ways to solve this.
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    2. COAnyhow, i have learned from your answer and thank you for it. Cheers.
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