TinTin++ Mud Client Manual

         The following special characters are defined:

#        The hashtag is the default character for starting a command and is
         subsequently known as the command character or tintin character.
         When loading a command file the command character is set to the
         first character in the file. The character can also be redefined
         using #config.

;        The semi-colon is used as the command separator and can be used to
         separate two commands. Multiple commands can be strung together as
         well. Trailing semi-colons are ignored when reading a script file
         as this is a common error.

{ }      Curly brackets aka braces are used for separating multi word command
         arguments, nesting commands, and nesting variables. Braces cannot
         easily be escaped and must always be used in pairs.

" "      Quote characters are used for strings in the #math, #if, #switch,
         and #case commands. It is however suggested to use a set of braces
         { } to define strings instead, particularly when checking strings
         that may contain quotes.

!        The exclamation sign is used to repeat commands, see #help history.
         The character can be redefined using #config.

\        An input line starting with a backslash is send verbatim if you are
         connected to a server. This character can be configured with
         #config, and is itself send verbatim when the verbatim config mode
         is enabled.

Related: colors, escape, function, mathematics, pcre and variable.