Which line in a program describes a note for the programmer and does not affect execution?

• A. Comment line
• B. Instruction line
• C. Code line
• D. Pause line

Answer: (A)

Notes for the programmer are written as a comment line because it is not executed by the computer. Comments provide documentation, explanations, or reminders for readers of the code without altering how the program runs. The interpreter or compiler simply ignores them, so they don’t affect the program’s behavior. In contrast, instruction lines or code lines contain actual operational statements that the machine executes, so they change what the program does. A pause line isn’t a standard construct for leaving notes; if a pause occurs, it would be implemented as a real instruction, not as a comment. Examples: in Python, a comment line starts with a #; in C/C++, // begins a comment or /* ... */ spans across lines.