Output documentation
Often, documentation for a software program is called Help.
comments
What works for most people is the person who has just bought your program has no idea how to use the program to its best advantage. The documentation should contain enough information for the user to work how to use the program without confusing the user.
Internal documentation is the one in which various information regarding the program is enlisted in the program itself i.e. in the form of comments. On the contrary, external documentation is the one that is prepared separately to inform the users about the system.
Technical documentation of code is important because it establishes credibility. Documentation of code is also important to establish authority.
The collection and summarization of written descriptions of what a program does and how to use it is typically referred to as documentation. Documentation provides information on a program's functionality, features, usage instructions, and often includes examples to help users understand how to interact with the software effectively. Good documentation is essential for users, developers, and other stakeholders to comprehend the program's capabilities and functionalities.
documentation-centric approach
With a compiler. Read the documentation for programming package for help on how to.
Read the documentation, and practice a lot.
With a compiler. Read the documentation for programming package for help on how to.
Yes, it is important at all phases of development, not just systems development. Documentation is an important part of the discipline of Systems Analysis and Design.