What symbol is used to denote comments in C++?

In C++, comments are used to annotate code and make it more understandable for anyone reading it. The correct answer, which states that both "//" and "/*" represent comment symbols, accurately reflects the language’s capability to handle different styles of comments.

The "//" symbol is specifically for single-line comments. Anything after "//" on that line is considered a comment and is ignored by the compiler. This is useful for brief annotations or notes that don’t require extensive explanation.

The "/" and "/" symbols are used to create multi-line comments, allowing programmers to wrap larger blocks of text in comments that span multiple lines. Everything between these two symbols is treated as a comment and ignored by the compiler as well.

Thus, the existence of both these comment styles means that the statement about both "//" and "/*" being valid comment indicators in C++ is indeed correct.