The first computer I personally owned had 256 bytes of memory. Bytes. The processor in my mouse and keyboard both have more memory than that. Lots more. Granted, 256 bytes was a bit extreme, but even ...

The ability to pass subroutine references is a powerful feature. Any subroutine you write that takes arguments can be thought of as a general routine and the arguments provide the specifics. For ...

First, you must understand that named subroutines are global by nature; that is, the subroutine name (identifier) lives in the package’s symbol ...

There are two types of subroutine: Procedures perform a specific task but do not return a value. Functions manipulate data and return a value to the main program. A local variable is a variable that ...

CALL statements invoke a subroutine to perform calculations, operations, or a service. CALL statements are often used in place of functions when the operation returns multiple results or, in some ...