Tests Of Comparison (X?Y, X?0) - HP 33s Owner's Manual

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
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.
If you execute a conditional test from the keyboard, the calculator will display 
or  .
Example:
The "Normal and Inverse–Normal Distributions" program in chapter 16 uses the
x<y ? conditional in routine T:
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
The Test Menus
x ? y
{≠} 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 ?
Programming Techniques
Page : 386
Size : 13.7 x 21.2 cm
¹ ¬
x ? 0
or
13–7