Section 2: Memory Stack, LAST X, and Data Storage 25
Example: Instead of the arrow diagrams we've used earlier, we'll use a table to
follow stack operation as we solve the expression
(3 + 4) × (6 − 4) ÷ 2:
LAST X
The HP-10C LAST X register, a separate data storage register, preserves the
value that was last in the display before execution of a numeric function.
*
This
feature allows you to perform constant arithmetic (reusing a number without re-
entering it). It can also assist you in error recovery.
Example: To multiply two separate values, such as 45.575 meters and 25.331
meters, by π:
*
The exceptions are the statistics functions ’, S, and L, which ignore the value
in the display (X register) and calculate a result from data in the statistics storage
registers (R
0
-R
5
).
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