HP HP-15C User Manual

Section 3: The Memory Stack, LAST X, and Data Storage 37
lost
T
z
z
z
z
Z
z
z
z
z
Y
y
y
y
y
X
7
0
6
y
6
Keys:
|`
6
Y
Order of Entry and the v Key
An important aspect of two-number functions is the positioning of the
numbers in the stack. To execute an arithmetic function, the numbers should
be positioned in the stack in the same way that you would vertically
position them on paper. For example:
98
98
98
98
-15
+15
x15
15
As you can see, the first (or top) number would be in the Y-register, while
the second (or bottom) number would be in the X-register. When the
mathematics operation is performed, the stack drops, leaving the result in
the X-register. Here is how a subtraction operation is executed in the
calculator:
lost
lost
T
t
z
y
y
y
Z
z
y
x
x
y
Y
y
x
98
98
x
X
x
98
98
15
83
Keys:
98
v
15
-
The same number positioning would be used to add 15 to 98, multiply 98 by
15, or divide 98 by 15.

HP HP-15C Specifications

General

Brand	HP
Model	HP-15C
Category	Calculator
Language	English