TopLevelDecl = Declaration | FunctionDecl | MethodDecl .
</pre>

<p>
The <i>scope</i> of a declared identifier is the extent of source text in which
the identifier denotes the specified constant, type, variable, function, label, or package.
</p>

<p>
Go is lexically scoped using <a href="#Blocks">blocks</a>:
</p>

<ol>