3–4 Storing Data into Variables
Clearing Variables
Variables' values are retained by Continuous Memory until you replace them or
clear them. Clearing a variable stores a zero there; a value of zero takes no
memory.
To clear a single variable:
Store zero in it: Press 0
I
variable.
To clear selected variables:
1. Press
{Y
{
#
} and use
or
to display the variable.
2. Press
{c
.
3. Press
to cancel the catalog.
To clear all variables at once:
Press
{c
{
#
}.
Arithmetic with Stored Variables
Storage arithmetic and recall arithmetic allow you to do calculations with a
number stored in a variable without recalling the variable into the stack. A
calculation uses one number from the X–register and one number from the
specified variable.
Storage Arithmetic
Storage arithmetic uses
I
,
I
,
Iz
, or
Iq
to do
arithmetic in the variable itself and to store the result there. It uses the value in the
X–register and does not affect the stack.
New value of variable = Previous value of variable {+, –,
×
,
÷
} x.
For example, suppose you want to reduce the value in A(15) by the number in the
X–register (3, displayed). Press
I
A. Now A = 12, while 3 is still in the
display.
