Recall arithmetic – HP 33s User Manual
Page 61
Storing Data into Variables
3–5
A
15
A
12
Result: 15 3
that is,A x
T
t
T
t
Z
z
Z
z
Y
y
Y
y
X
3
X
3
Recall Arithmetic
Recall arithmetic uses
L
,
L
,
L z
, or
L q
to do
arithmetic in the X–register using a recalled number and to leave the result in the
display. Only the X–register is affected.
New x = Previous x {+, –,
Ч, ч} Variable
For example, suppose you want to divide the number in the X–register (3,
displayed) by the value in A(12). Press
L q
A. Now x = 0.25, while 12 is
still in A. Recall arithmetic saves memory in programs: using
L
A (one
instruction) uses half as much memory as
L
A,
(two instructions).
A
12
A
12
T
t
T
t
Z
z
Z
z
Y
y
Y
y
X
3
X
0.25
Result: 3 12
that is, x 12
Example:
Suppose the variables D, E, and F contain the values 1, 2, and 3. Use storage
arithmetic to add 1 to each of those variables.