</pre>

<p>
In <a href="https://www.unicode.org/versions/Unicode8.0.0/">The Unicode Standard 8.0</a>,
Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo
as Unicode letters, and those in the Number category Nd as Unicode digits.
</p>

<h3 id="Letters_and_digits">Letters and digits</h3>

<p>

all packages with a summary for each. This page can also contain an overall description of the set of packages. Package Each package has a page that contains a list of its classes and interfaces, with a summary for each. This page can contain four categories: Interfaces (italic) Classes Enums Exceptions Errors Annotation Types Class/Interface Each class, interface, nested class and nested interface has its own separate page. Each of these pages has three sections consisting of a class/interface description,...