Answer: A method without body is called abstract method. A abstract method can be called from a non abstract class or method provided it is inherited using a subclass.
Explanation:
An abstract method is a method which does not have a body, it just has opening and closing curly braces. A class having an abstract method is also declared as abstract class. We cannot make an object of the abstract class.
example : public abstract float multiply(float x, float y);
is an example of abstract method.
calling an abstract method from a non abstract method is possible provided it is inherited by a non abstract subclass.
