TinTin++ Mud Client Manual
         VARIABLE

Command: #variable {variable name} {text to fill variable}

         Variables differ from the %0-99 arguments in the fact that you can
         specify a full word as a variable, and they stay in memory for the
         full session unless they are changed.  They can be saved in the
         coms file, and can be set to different values if you have two or
         more sessions running at the same time.  Variables are global for
         each session and can be accessed by adding a $ before the variable
         name.

Example: #alias {target} {#var target %0}
         #alias {x}      {kick $target}

         The name of a variable must exist of only letters, numbers and
         underscores in order to be substituted.  If you do not meet these
         requirements do not panic, simply encapsulate the variable in braces:

Example: #variable {cool website} {http://tintin.sourceforge.net}
         #chat I was on ${cool website} yesterday!.

         Variables can be nested using brackets or dots:

Example: #var hp[self] 34;#var hp[target] 46

         You can see the first nest of a variable using $variable[+1] and the
         last nest using $variable[-1]. Using $variable[-2] will report the
         second last variable, and so on. To show all indices use $variable[].
         To show all values use $variable[%*] or a less generic regex.

         Nested variables are also known as tables, table generally being used
         to refer to several variables nested within one specific variable.

Example: #show {Targets starting with the letter A: $targets[A%*]

         To see the internal index of a variable use &<variable name>. To see
         the size of a table you would use: &targets[] or &targets[%*]. A non
         existent nested variable will report itself as 0.

Example: #show {Number of targets starting with A: &targets[A%*]

         In some scripts you need to know the name of a nested variable. This
         is also known as the key, and you can get it using *variable. For
         example *target[+1]. To get the first variable's name use *{+1}.

         It's also possible to declare a table using brace notation. Using
         #var hp[self] 34 is the equivalent of #var {hp} {{self}{34}}. This
         also allows merging tables. #var hp[self] 34;#var hp[target] 46 is
         the equivalent of #var {hp} {{self}{34} {target}{46}} as well as
         #var {hp} {{self}{34}} {{target}{46}} or if you want to get creative
         the equivalent of #var hp[self] 34;#var {hp} {$hp} {{target}{46}}.

Comment: You can remove a variable with the #unvariable command.

Related: cat, format, function, local, math, replace and script.