HP HP-11C User Manual

34 Section 2: Memory Stack, LAST X, and Data Storage
makes it easy to recover from keystroke mistakes, such as
executing the wrong function or keying in the wrong number. For
example, divide 287 by 13.9 after you have mistakenly divided by
12.9:
Keystrokes Display
287 287.0000
12.9 (5] 22.2481 Oops! The wrong divisor.
12.9000 Retrieves from LAST X
the last entry to the X-
register (the incorrect
divisor) before [+]was
executed.
287.0000 Perform the reverse of the
function that produced the
wrong answer.
13.9(%] 20.6475 The correct answer.
Constant Arithmetic
Because the number in the T-register remains there when the stack
drops, this number can be used as a constant in arithmetic
operations.
T
A 2
Y =
X=»
Keys =
To insert a constant into a calculation, load the stack with the
constant by keying the constant into the X-register and pressing
three times. Use the constant by keying in your initial
argument and executing your planned series of arithmetic
operations. Each time the stack drops, a copy of the constant will
be made available for your next calculation and a new copy of the
constant is reproduced in the T-register.

HP HP-11C Specifications

General

Brand	HP
Model	HP-11C
Category	Calculator
Language	English