Numeric Functionsandthestack; Stack Movement - HP -16C Owner's Handbook Manual

24 Section 2: The Automatic Memory Stack
The feature allows you to reuse a constant value without
re-entering it (as shown under Calculations with Constants, page
26). It can also assist you in error correction by recovering the
number that was in the calculator before the last numeric
operation.
For example, suppose you mistakenly entered the wrong addend
(10 instead of 11) in a chain calculation:
Keystrokes Display
Binary mode. Display
shows the last result.
1010 1010 b
10 1100 b Oops! The wrong
number was keyed in.
(9](LSTx] 10 b Retrieves from LAST X
the last entry to the
X-register (the incorrect
addend) before [+]was
executed.
(-] 1010 b Reverses the function
that produced the wrong
answer.
11 1101 b The correct answer.
Numeric Functions and the Stack
Stack Movement
When you want to key in two numbers, one after the other, you
must press between entries of the numbers. However, when
you want to key in a number immediately following any function
(including stack manipulations such as [R¥]), you do not need to
use [ENTER]. Executing most HP-16C functions has this additional
effect:
e The automatic memory stack is lift-enabled; that is, the stack
will lift automatically when the next number is keyed in or
recalled from storage into the display.
e Digit entry is terminated, so the next number starts a new
entry.