A subprogram is basically a program within a program. It performs a specific function and is independent of the program itself.

In This Chapter:

Parameters

Parameters in a subprogram must match the parameters in the subprogram definition.

Activation Records

Whenever a subprogram is called, an activation record is made. A recursive subprogram is basically a program that calls itself.

Referencing Environments and Scope

What are different types of Referencing Environments, Type Parameters and Parameterized Types