List three instances when comments should be used in a program. Why are comments important to a program? Should comments be used for every line of code?
What will be an ideal response?
Comments are typically used in these four situations (student should list at least three):
1. To begin a program with a statement of purpose or to orient a programmer called on to modify the program in the future.
2. To accompany a variable declaration with a comment that explains the variable's purpose.
3. Preceding major segments of code with a comment that explains their purpose.
4. To explain complex or tricky sections of code.
Comments are important to explain your code to a new programmer updating or maintaining a program you wrote, or to remind yourself in the future about nuances of the program.
Comments should not be used for self-explanatory lines of code. Overuse of comments makes the program unwieldy to update and confusing to read. The best-written programs are self-documenting; that is, the reader can understand the code from the symbols used and the overall organization of the program.
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