cb404-7" tabindex="-1"></a><span class="do">## Warning in multiply_columns(city$aberdeen, city$nairobi): The function has</span></span>
<span id="cb404-8"><a href="loops.html#cb404-8" tabindex="-1"></a><span class="do">## produced NAs</span></span>
<span id="cb404-9"><a href="loops.html#cb404-9" tabindex="-1"></a>i <span class="ot">&lt;-</span> <span class="dv">2</span></span>
<span id="cb404-10"><a href="loops.html#cb404-10" tabindex="-1"></a><span class="fu">identical</span>(<span class="fu">multiply_colu