Tests of comparison (x?y, x?0) – HP 33s User Manual
Page 191
Programming
Techniques
13–7
Flag tests. These check the status of flags, which can be either set or clear.
Loop counters. These are usually used to loop a specified number of times.
Tests of Comparison (x?y, x?0)
There are 12 comparisons available for programming. Pressing
{ n
or
| o
displays a menu for one of the two categories of tests:
x?y for tests comparing x and y.
x?0 for tests comparing x and 0.
Remember that x refers to the number in the X–register, and y refers to the number
in the Y–register. These do not compare the variables X and Y.
Select the category of comparison, then press the menu key for the conditional
instruction you want.
The Test Menus
x?y
x?0
{
≠} for x ≠ y?
{
≠} for x≠0?
{
≤} for x≤y?
{
≤} for x≤0?
{
<} for x<y?
{
<} for x<0?
{
>} for x>y?
{
>} for x>0?
{
≥} for x ≥y?
{
≥} for x≥0?
{/} for x=y?
{/} for x=0?
If you execute a conditional test from the keyboard, the calculator will display &
or .
For example, if x =2 and y =7, test x
<y .
Keys:
Display:
In RPN mode
7
2
{ n
{
<}
&
In ALG mode
7
[
2
{ n
{
<}
&