In contrast to other identifiers, labels are not block scoped and do
not conflict with identifiers that are not labels. The scope of a label
is the body of the function in which it is declared and excludes
the body of any nested function.
</p>


<h3 id="Blank_identifier">Blank identifier</h3>

<p>
The <i>blank identifier</i> is represented by the underscore character <code>_</code>.

For example, here is a simple complete function definition. The <code>TEXT</code>
directive declares the symbol <code>runtime·profileloop</code> and the instructions
that follow form the body of the function.
The last instruction in a <code>TEXT</code> block must be some sort of jump, usually a <code>RET</code> (pseudo-)instruction.

	<li>The scope of an identifier denoting a method receiver, function parameter,
	    or result variable is the function body.</li>

	<li>The scope of an identifier denoting a type parameter of a function
	    or declared by a method receiver begins after the name of the function
	    and ends at the end of the function body.</li>

	<li>The scope of an identifier denoting a type parameter of a type