HP 15c Collector's Edition User Manual

Section 8: Program Branching and Controls 91
(that is, a prior line), the series of instructions between the t and the
label will be executed repeatedly—possibly indefinitely. The continuation
of this loop can be controlled by a conditional branch, an ¦ instruction
(written into the loop), or simply by pressing any key during execution
(which stops the program).
015-´ b 7
016-
017-
018-
019-t 7
020-
Conditional Tests
Another way to alter the sequence of program execution is by a
conditional test, a true/false test which compares the number in the X-
register either to zero or to the number in the Y-register. The HP 15c
provides 12 different tests, two explicit on the keyboard and 10 others
accessible using | T n.
*
1. Direct: | £ and | ~.
2. Indirect: | T n.
n Test n Test
0 x ≠ 0 5 x = y
1
x
>
0
6
x
≠
y
2
x
<
0
7
x
>
y
3
x
≥
0
8
x
<
y
4
x
≤
0
9
x
≥
y
*
Four of the conditional tests can also be used for complex values, as explained in Section
11 on page 132.

HP 15c Collector's Edition Specifications

General

Brand	HP
Model	15c Collector's Edition
Category	Calculator
Language	English