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Comments are written in C to enhance the readability of the program. Comments may be written to indicate the platform on which the program is written to run on, the author of the program, the purpose of the program, the purpose of a statement, or any other documentation purposes.
Comments can appear at any part of the program, even within statements. Commented portions are marked by a leading / * and a trailing */ called the comment delimiters. The compiler while generating the actual code for the source program ignores all text written within comment delimiters. Example comments might be: