This command allows you to perform simple arithmetic to variables. The value given by the amount parameter is added to the current value of the variable. If amount is not numeric, an error occurs. amount can also be a reference to another variable, adding its current value to the value of the listed variable. To subtract a value, use a negative amount.
This is the only specific math function separately implemented in zMUD (for compatibility). A full MATH command, ala TINTIN, is also available.