3.1.1.11 Parameters of subroutines.

Question 1

How do we pass an argument?

Answer 1

In java methods, arguments are passed by value. When invoked, the method receives the value of the variable passed in.

Question 2

Outline passing data through parameters when the argument is of reference type.

Answer 2

Pass-by-value means that the method cannot change the object reference, but can invoke the objects methods and modify accessible variables within the object.

Question 3

Define a subroutine interface.

Answer 3

A subroutine interface is the method which allows local variables to be visible in all parts of the program. An example of an interface variable is percentage.