R()
r(<number>)
The r() function is used to access "local registers", and returns the contents of the specified register. There are thirty-six such registers, numbered 0 through 9 and A through Z. The local registers are normally cleared at the start of each command, but are preserved across the commands that compose an action list, as well as commands that directly trigger action lists, such as @switch, @trigger, and @dolist.