Subroutines

What is a subroutine?

A subroutine is a named piece of code that can

Advantages

• Allows the subroutine to be called in more than one place within the program
• The subroutine can be tested independently
• Allows modular development of the program
• Allows a team of programmers to work independently on different components of a program
• Reduces the duplication of code within a program
• If there needs to be changes made (due to a bug etc) the changes can be made in on place.

Disadvantages

Procedures vs Functions

External subroutines

• External files
• Importing in-built modules
• External libraries