HP 35s User Manual

Programming Techniques 14-7
 Comparison tests. These compare the X–and Y–registers, or the X–register
and zero.
 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   or 
 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. You can use x?y and
x?0 to compare two numbers, if one of these isn't real number, it will return an error
message  .
Select the category of comparison, then press the menu key for the conditional
instruction you want.
The Test Menus
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 .
x?yx?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?

HP 35s Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Black
Digits	14 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157.9 x 18 x 82 mm