Is there a standard for mentioning variables within comments?

Question

I understand that, in principle, modern programming languages are intended to be used in a manner where the code written is self-documenting.

However, I was taught that on occasion it is necessary to explicitly write a brief precondition, postcondition statement for a function to assert generality. If I had a need to mention a variable by name in the comment is there a standard for denoting that it's a variable?

Answer 1

Please use doxygen for C, it is the de-facto-standard and worth the effort.

https://www.doxygen.nl/manual/commands.html

\pre { description of the precondition }

Starts a paragraph where the precondition of an entity can be described. The paragraph will be indented. The text of the paragraph has no special internal structure. All visual enhancement commands may be used inside the paragraph. Multiple adjacent \pre commands will be joined into a single paragraph. Each precondition will start on a new line. Alternatively, one \pre command may mention several preconditions. The \pre command ends when a blank line or some other sectioning command is encountered.