e 4<sup>th</sup> column with the non-existent 5<sup>th</sup> column.</p>
<p>Again, it’s a good idea to test that we are getting something sensible from our loop (remember, check, check and check again!). To do this we can use the <code>identical()</code> function to compare the variables we created <code>by hand</code> with each iteration of the loop manually.</p>
<div class="sourceCode" id="cb404"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb404-1"><a href="loops.html#cb404-1" tabinde