   <dt id="length" class="callable">
          <span class="name"><a href="dart-io/File/length.html">length</a></span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="dart-async/Future-class.html">Future</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="dart-core/int-class.html">int</a></span>&gt;</span></span>
          </span>
                  </dt>
        <dd>
          Get the length of the file. Returns a <code>Future&lt;int&gt;</