Final answer:
Writing code with future maintainability in mind allows for easier updates and modifications to a program. Types of maintenance include fixing bugs, adding features, improving efficiency and user interface, and integrating with other programs.
Step-by-step explanation:
Writing code with future maintainability in mind is important because it allows for easier and more efficient updates and modifications to be made to the program in the future. Some types of maintenance that might be done on an existing program include fixing bugs, adding new features, improving efficiency, improving the user interface, and making the program interface with another program.