TinTin++ Mud Client Manual

Command: #nop {whatever}

         Short for 'no operation', and is ignored by the client.  It is useful
         for commenting in your coms file, any text after the nop and before a
         semicolon or end of line is ignored. You shouldn't put braces { } in it
         though, unless you close them properly.

         A valid alternative for #nop is #0.

Comment: By using braces you can comment out multiple lines of code in a script

         For commenting out an entire trigger and especially large sections of
         triggers you would want to use /* text */

Example: #nop This is the start of my script file.

Related: read