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COMMENT commentstring and COMMENT ...one or more lines... ENDCOMMENT The first form of the COMMENT command is functionally identical to the # command, and allows the insertion of a single comment line into the input file. In the second form, the line is blank after the initial COMMENT keyword, and all following lines up to and including the next matching ENDCOMMENT command are treated as comments. These lines may contain COMMENT commands and COMMENT ... ENDCOMMENT sequences, provided that these are balanced. This provides a convenient facility for temporarily causing part of the input to be ignored without having to physically remove it.