a value of type <code>int</code>; and if it is typed
	    it must be of <a href="#Numeric_types">integer type</a>.
	</li>
	<li>An element without a key uses the previous element's index plus one.
	    If the first element has no key, its index is zero.
	</li>
</ul>

<p>
<a href="#Address_operators">Taking the address</a> of a composite literal