features introduced after Go 1.
</p>

<h4 id="Go_1.9">Go 1.9</h4>
<ul>
<li>
An <a href="#Alias_declarations">alias declaration</a> may be used to declare an alias name for a type.
</li>
</ul>

<h4 id="Go_1.13">Go 1.13</h4>
<ul>
<li>
<a href="#Integer_literals">Integer literals</a> may use the prefixes <code>0b</code>, <code>0B</code>, <code>0o</code>,