11.1. Identifiers

The names of variables, functions, classes, and so on are collectively called identifiers. In Scala, you have more choices for forming identifiers than in Java. Of course, you can follow the time-honored pattern: sequences of alphanumeric characters, starting with an alphabetic character or an underscore, such as fred12 or _Wilma.

As in Java, Unicode characters are allowed. For example, José or σoφός are valid identifiers.