Variables (Registers) - HP -22S Owner's Manual

88485
5
Stop! You really want
to add 8
+
%.
• 'sWAPI
-:-4.13131313
Swaps the 5 and 4 .
G
9.251313
Completes the
calculation.
70[0689
- 9
No! You meant 9 - 6!
.,sWAPIG
21.13131313
Calculates 7 x (9 -
6).
An important use of .,
SWAP I
is with functions that require two num-
bers separated by
'INPUT
I.
For example, to accumulate x,y-data in the
statistics registers, you key in
x-value
'INPUT I
y-value ,
2:+
I.
Pressing
. , SWAP I
(before you've pressed []B) exchanges
x-value
and
y-value.
Variables (Registers)
The HP-22S has 26 registers, or "variables," for storing and recalling
numbers. The variables are identified by the letters A through Z. (The
same 26 variables are used to enter, evaluate, and solve equations; see
chapter 6.)
Pressing ,
STO I
or ,
RCL I
turns on the A .. Z annunciator, indicating that
the keys are now using their letter assignments.
• 'STO I
letter
stores a copy of the displayed number into the desig-
nated variable.* The number is copied with full precision (all 12
digits). The new value overwrites the previous contents of the
variable.
• 'RCL
I letter
copies the current value stored in the variable to the dis-
play.* The number is displayed in the current display format.
, STO I
letter
and ,
RCL I
letter
display labeled values (for example,
A= 1.2345), unless the store or recall is done in the middle of a cal-
culation (see the following example).
• During equation entry,
I
STO
I
letter and
I
ReL
I
letter type the specified letter (see page 73).
2: Arithmetic and Variables 37