HP 25 User Manual

50 Function Keys
I n the above example, when you pressed c:::::J, the contents
of the stack and LAST X registers were changed .
. . . from
this. . . . .. to this.
T 0.00 T 0.00
Z ~OO Z ~oo
y 0.00
X 3.80
LAST X
1 3.16 1
y 3.80 LAST X
X 3.16 . 1 3.16 1
This made possible the correction illustrated in the example
above.
Recovering a Number
The LAST X register is useful in calculations where a number
occurs more than once. By recovering a number using c:::::J ,
you do not have to key that number into the calculator again.
Example: Calculate
7.32 + 3.650112331
3.650112331
Press
7.32
milE]
3.650112331
G
c:::::J
El
Display
17.32
17.32
13.6501123311
110.97 1
13.65 1
13.01 1
Prefix Clear
Intermediate answer.
Recalls 3.650112331 to X-register.
The answer.
The c:::::J (clear prefix) key will clear a blueliJ prefix key , a
gold prefix
key , ma , 1m , or mm (mm is explained in
section 5, Programming). To clear a prefix you have mistakenly
pressed, merely press c:::::J as the next keystrokes,
then press the correct key. For example, to change a blue prefix
keystroke to that of another key during a calculation:
Press Display
2 1iJ Oops! You meant to change the
sign
of the number in the display,
but you
pressed the blue prefix
key by mistake.

HP 25 Specifications

General

Brand	HP
Model	25
Category	Calculator
Language	English