A program’s welcome message consists of a series of comments. The contents of comments are ignored by the computer while running a program.  Program comments are also known as external documentation....

A program’s welcome message consists of a series of comments. The contents of comments are ignored by the computer while running a program.  Program comments are also known as external documentation. Step comments are intended to be read by someone using the program.  If you are sure that you have coded a program correctly, then there is no need to test it.