>&nbsp;i&nbsp;+&nbsp;1</code>, and <code class="code">s</code> is the
    string <code class="code"><span class="string">"x&nbsp;=&nbsp;1"</span></code>, then <code class="code"><span class="constructor">Scanf</span>.sscanf&nbsp;s&nbsp;<span class="string">"%_s&nbsp;=&nbsp;%i"</span>&nbsp;f</code> returns <code class="code">2</code>.</p>

<p>The field width is composed of an optional integer literal
    indicating the maximal width of the token to read.
    For instance, <code class="code">%6d</code> reads 