What is an abstract variable?

A concept or idea not associated with any specific instance. A sketchy summary of the main points of an argument or theory. There is nothing like ‘abstract variable’ in Java. Abstract implies that the abstract methods within abstract classes must be coded.

What is abstract variable in C#?

An abstract class is a special type of class that cannot be instantiated and acts as a base class for other classes. An abstract class is a special type of class that cannot be instantiated and acts as a base class for other classes. Abstract class members marked as abstract must be implemented by derived classes.

Can I declare abstract variable?

No. You can only declare classes as abstract, and variables as references to classes (or as value types). And base can hold a reference to any class derived from MyBase.

Can C# property be abstract?

An abstract property declaration does not provide an implementation of the property accessors — it declares that the class supports properties, but leaves the accessor implementation to derived classes. The following example demonstrates how to implement the abstract properties inherited from a base class.

Can abstract class have private variables?

However an abstract (purely virtual) class can allow access to private variables the same way any other class can, like through friends, or (non-private) accessor methods. In your above example it appears you only need to add a public constructor to your Base class, and derived classes.

What is abstract class interface?

Abstract class and Interface are two object oriented constructs found in many object oriented programming languages like Java. Abstract class can be considered as an abstract version of a regular (concrete) class, while an interface can be considered as a means of implementing a contract.

What is abstract method in PHP?

In PHP, Abstract Method is special Abstract Class Method whose body contains only a Method Signature but doesn’t contain any code, That’s mean, only the Name of the Method and the Parameters are declared.

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