What characteristic defines a void method?

A void method is characterized by its inability to return a value, which is precisely why it has no return type specified other than the keyword 'void'. This means that when the method is called, it performs its operations but does not provide any output in terms of a return value.

While it is possible for a void method to have parameters, that is not a requirement nor does it define its 'void' nature. The concept of a method being 'void' is solely related to the lack of a return type. Furthermore, void methods can be defined in a variety of contexts beyond just classes, although they are typically used within classes in Java.

Thus, the defining feature of a void method is that it does not return a value, allowing it to execute actions without producing a result.