GNU Emacs Calc 2.02 Manual - Storing and Recalling Go to the previous , next section. Storing and Recalling Calculator variables are really just Lisp variables that contain numbers or formulas in a form that Calc can understand. The commands in this section allow you to manipulate variables conveniently.
Commands related to variables use the s prefix key.
It prompts you to enter the name of the variable. Or you can enter any variable name. Its only purpose is to enable you to use Calc variables without fear of accidentally clobbering some variable in another Emacs package. The s s command leaves the stored value on the stack. All the arithmetic stores accept the Inverse prefix to reverse the order of the operands.