HP F2219AA#ABA HP 20b Business Consultant Financial Calculator Manual - Page 19

Last Number, <<<<&lt, O1c23, I56c1

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Mathematical Calculations (+) When an operation is performed on the stack, addition for instance, the calculator "pops" or moves the two numbers from the bottom levels (Levels 1 and 2) out of the stack, performs the operation, and "pushes" the results back into the stack. + With the numbers entered into the stack as shown in Figure 3, pressing changes the stack as shown in Figure 4. Note that when the numbers are "popped" out to add 23 and 41, Level 4 of the stack remains unchanged. -15 -15 12 64 Figure 4 The RPN Stack of Figure 3 after the Addition Operation Last Number :d Each time you perform a mathematical operation, the content of Level 1 of the stack is saved. Pressing recalls that number. This functionality can be used to undo an erroneous key press, or if you want to reuse a number, such as 56.123 in the expression: 1.23  56.123 56.123 See Table 2-2 for an example using the last number function. Table 2-2 Last Number Keys :u3I Display Description Sets FIX= to 3.000

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Mathematical Calculations
19
When an operation is performed on the stack, addition
(
+
)
for instance, the calculator "pops" or moves the two numbers
from the bottom levels (Levels 1 and 2) out of the stack, performs the operation, and "pushes" the results back into the stack.
With the numbers entered into the stack as shown in Figure 3, pressing
+
changes the stack as shown in Figure 4. Note
that when the numbers are "popped" out to add 23 and 41, Level 4 of the stack remains unchanged.
-15
-15
12
64
Figure 4 The RPN Stack of Figure 3 after the Addition Operation
Last Number
Each time you perform a mathematical operation, the content of Level 1 of the stack is saved. Pressing
:d
recalls that
number. This functionality can be used to undo an erroneous key press, or if you want to reuse a number, such as 56.123 in
the expression:
123
.
56
123
.
56
23
.
1
See Table 2-2 for an example using the
last number
function.
Table 2-2
Last Number
Keys
Display
Description
:u3I
Sets
FIX=
to 3.000
<<<<<
II
Selects
RPN
as the operating mode.
O1c23
I56c1
23
Inputs 1.23 and 56.123