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POWhile Loops in Ruby and Converting to a Function
 

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    <p>I'm on <a href="http://ruby.learncodethehardway.org/book/ex33.html" rel="nofollow">Chapter 33</a> of Learn Ruby the Hard Way.</p> <p>Extra credit exercise 1 asks:</p> <blockquote> <p>Convert this while loop to a function that you can call, and replace 6 in the test (i &lt; 6) with a variable.</p> </blockquote> <p>The code:</p> <pre><code>i = 0 numbers = [] while i &lt; 6 puts "At the top i is #{i}" numbers.push(i) i = i + 1 puts "Numbers now: #{numbers}" puts "At the bottom i is #{i}" end puts "The numbers: " for num in numbers puts num end </code></pre> <p>My attempt:</p> <pre><code>i = 0 numbers = [] def loops while i &lt; 6 puts "At the top i is #{i}" numbers.push(i) i = i + 1 puts "Numbers now: #{numbers}" puts "At the bottom i is #{i}" end end loops puts "The numbers: " for num in numbers puts num end </code></pre> <p>As you can see, I got as far as trying to make the block into a function, not yet making the 6 a variable. </p> <p>Error:</p> <pre><code>ex33.rb:5:in `loops': undefined local variable or method `i' for main:Object (Na meError) from ex33.rb:15:in `&lt;main&gt;' from ex33.rb:15:in `&lt;main&gt;' </code></pre> <p>What am I doing wrong?</p> <p>EDIT: Okay, improved it a little. Now the numbers variable is out of scope...</p> <pre><code>def loops (i, second_number) numbers = [] while i &lt; second_number puts "At the top i is #{i}" i = i + 1 numbers.push(i) puts "Numbers now: #{numbers}" puts "At the bottom i is #{i}" end end loops(0,6) puts "The numbers: " for num in numbers puts num end </code></pre>
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