Recalling Variables
===================

The most straightforward way to extract the stored value from a
variable is to use the `s r' (`calc-recall') command.  This command
prompts for a variable name (similarly to `calc-store'), looks up the
value of the specified variable, and pushes that value onto the stack.
It is an error to try to recall a void variable.

It is also possible to recall the value from a variable by evaluating
a formula containing that variable.  For example, `' a RET =' is the
same as `s r a RET' except that if the variable is void, the former
will simply leave the formula `a' on the stack whereas the latter will
produce an error message.

The `r' prefix may be followed by a digit, so that `r 9' is equivalent
to `s r 9'.  (The `r' prefix is otherwise unused in the current
version of Calc.)