 <p>character</p>

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
    <pre class="examples"><div class='input'>
<span class='fu'>build_query_string</span>(<span class='kw'>country</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='st'>"ALB"</span>, <span class='st'>"CHN"</span>),
<span class='kw'>povline</span> <span class='kw'>=</span> <span class='fl'>1.9</span>,
<span class='kw'>year</span> <spa