HP 12C Financial 12C manual Recalls test value into X-register

Section 9: Branching and Looping 131

RPN program notes: We’ll key the income into the display before running the

program so that it will be in the X-register when the :0 instruction in program line 001 is executed. This instruction will place the test value 20,000 in the X-register and (as explained in Appendix A) move the income into the Y-register. The ~ instruction in program line 002 will exchange the numbers in the X- and Y-registers (as also explained in Appendix A): that is, it will place the income back into the X-register and place the test value into the Y-register. This is necessary because when either the :2 instruction in line 005 or the :1 instruction in line 007 is executed, the number in the X-register is moved into the Y-register; if the

~instruction were not included, the test value 20,000, rather than the income, would be in the Y-register when the binstruction in line 008 is executed.

Keystrokes (RPN mode)

f] fs

fCLEARÎ

:0

~

Display

007,43,33,002 Sets calculator to Program mode. (Display shows program line at which execution was halted at end of preceding example.)

000,			Clears program memory.
001,	45	0	Recalls test value into X-register
			and places income in Y-register.
002,		34	Places income in X-register and
			test value in Y-register.

File name: hp 12c pt_user's guide_English_HDPMF123E27	Page: 131 of 275
Printed Date: 2005/8/1	Dimension: 14.8 cm x 21 cm