9.18.2.3 Special Characters ........................... The presence of a '#' on a line indicates the start of a comment that extends to the end of the current line. Note that if a line starts with a '#' character then it can also be a logical line number directive DONTPRINTYET (Comments) or a preprocessor control command (*noteDONTPRINTYET (Comments) or a preprocessor control command ( Preprocessing). A semicolon (';') can be used to separate multiple statements on the same line.