HP HP-20S - Page 85

8 13- 8 Enters tax rate.
<) 14- 51 14
(=] 15- 74 38% of x-value.
R/S 16- 26 Halts program.
= 0 17- 61 410 Starts routine for
income < 30,000.
Y 18- 51 31 Exchanges 30,000 and
x-value.
19- 55 Multiplies x-value.
2 20- 2 Each digit uses one
program line.
8 21- 8 Enters tax rate.
(#) 22- 51 14
(=) 23- 74 28% of x-value.
R/S 24- 26 Halts the program.
(-] d6éb6 Checksum (page 66).
) Exits Program mode.
Test the program by comparing samples done manually. For example,
15000 28 [\](%][=] 4,200.0000. Test a few more incomes manually,
then run the program and compare them. To run the program, enter
the income value in the display and press A.
The : that appears in the display after the program is complete is
caused by the that separates income from 30,000 for the condi-
tional test in line 08. The program can be rewritten so that is used
to separate income from 30,000 for the conditional test. Also, to save
program lines, the common keystrokes can be grouped together. The
following program uses conditional branching and unconditional
branching for the common keystrokes.
6: Programming 83