ss="op">=</span> <span class="st">"\n"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> apple    :003€</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> pineapple:007€</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># na behavior: default/NA/other</span></span></span>
<span class="r-in"><span><span class="va">x</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" 