Comments

REM is the only comment keyword. Everything after it, to the end of the line, is ignored by the compiler:

comments.hdc


REM this line does nothing
STRING hello  REM this is NOT a trailing comment — it would be typed literally

REM only works as the first word on a line. There’s no way to add a trailing comment after another command on the same line — put comments on their own line.

Last updated on July 23, 2026

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