HP 17BIIPLUS - Doing Arithmetic Inside Registers and Variables

46 2: Arithmetic
The
s
and
R
keys can also be used with variables. For example,
s
+
(in the MU%C menu) stores the rightmost number from the
display into the variable M%C.
R
+
copies the contents of
M%C into the calculator line. If there is an expression in the display
(such as
$)+!
), then the recalled number replaces only the last
number.
You do not need to clear storage registers before using them. By storing
a number into a register, you overwrite whatever existed there before.
Doing Arithmetic Inside Registers and Variables
You can also do arithmetic inside storage registers.
Keys: Display: Description:
45.7
s
3
+.&-("
Stores 45.7 in reg. 3.
2.5
s*
3
$&.("
Multiplies contents of
register 3 by 2.5 and stores
result (114.25) back in
register 3.
R
3
##+&$."
Displays register 3.
Table 2-3. Arithmetic in Registers
Keys New Register Contents
s+
old register contents + displayed number
s-
old register contents – displayed number
s*
old register contents x displayed number
s/
old register contents ÷ displayed number
s@u
old register contents ^ displayed number
v