How do you comment code in Python?

• A. By using the // symbol for single-line comments
• B. By using the # symbol for single-line comments
• C. By placing comments within parentheses
• D. By using the /* */ symbols

Answer: (B)

In Python, the correct way to add single-line comments is by using the # symbol. This indicator tells the interpreter to ignore everything following it on that line. Comments are essential for documenting the code, explaining what certain parts of it do, or providing instructions for future editing. They can enhance the readability of the code and help others (or oneself at a later date) to understand the purpose behind specific code segments without executing those lines.

The other options represent different conventions used in other programming languages. For example, the // symbol is typical in languages like C++ and Java for single-line comments, while the /* */ symbols are used in C-based languages for multi-line comments. Placing comments within parentheses is not a recognized way to comment in Python and would not effectively communicate intent to the interpreter.