Arithmetic calculations with constants – HP 15c User Manual

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Section 3: The Memory Stack, LAST X, and Data Storage

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Arithmetic Calculations With Constants

There are three ways (without using a storage register) to manipulate the
memory stack to perform repeated calculations with a constant:

1. Use the LAST X register.

2. Load the stack with a constant and operate upon different

numbers. (Clear the X-register every time you want to change
the number operated upon)

3. Load the stack with a constant and operate upon an

accumulating number. (Do not change the number in the X-
register.)

LAST X. Use your constant in the X-register (that is, enter it second) so
that it always will be saved in the LAST X register. Pressing |K will
retrieve the constant and place it into the X-register (the display). This can
be done repeatedly.

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