How to “comment-out” (add comment) in a batch/cmd?

by

Use :: or REM

::   commenttttttttttt
REM  commenttttttttttt

BUT (as people noted):

  • if they are not in the beginning of line, then add & character:
    your commands here & :: commenttttttttttt
  • Inside nested parts (IF/ELSE, FOR loops, etc…) :: should be followed with normal line, otherwise it gives error (use REM there).
  • :: may also fail within setlocal ENABLEDELAYEDEXPANSION

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