What indicates a method as virtual in Avaloq Script?

In Avaloq Script, a method is indicated as virtual when it is marked with the "virtual" keyword. This keyword specifically acts as a modifier that allows the method to be overridden in derived classes. When a method is declared as virtual, it allows for polymorphic behavior, enabling the derived classes to provide a specific implementation while still being able to reference the base class's method through the original method signature.

Using "public" merely defines the accessibility of a method, meaning it can be accessed from outside the class. However, it does not imply that the method can be overridden. Similarly, a method defined in an abstract class can be virtual, but it is not the defining characteristic, as a method can be virtual even if it exists in a concrete (non-abstract) class. The return type of "void" simply signifies that no value is returned from the method and does not confer any attributes regarding the method's ability to be overridden.

Thus, the emphasis on the "virtual" keyword is crucial for enabling a method to be overridden, which is an integral part of achieving polymorphism in object-oriented programming.