In JavaScript, which symbol is used for comments?

In JavaScript, the symbol used for comments is the double forward slash (//). This indicates that anything following this symbol on the same line will be treated as a comment and not executed as code. This is useful for adding notes or clarifications in the code without affecting its functionality, allowing developers to explain complex sections or to remind themselves about certain logic.

The choice of symbols for comments varies in different programming languages. For instance, while single-line comments in JavaScript are marked with //, multi-line comments use /* to begin and */ to end. Other languages, such as Python, use a hash (#) for comments, while some use different notations entirely.

Understanding comment syntax is crucial for maintaining code clarity, as comments can significantly enhance readability and facilitate easier future modifications by providing context or explanations for fellow developers or future reference.