HP 35s User Manual

14-18 Programming Techniques
Loops with Counters (DSE, ISG)
When you want to execute a loop a specific number of times, use the  
(increment; skip if greater than) or
  (decrement; skip if less than or equal
to) conditional function keys. Each time a loop function is executed in a program, it
automatically decrements or increments a counter value stored in a variable. It
compares the current counter value to a final counter value, then continues or exits
the loop depending on the result.
For a count–down loop, use
  variable
For a count–up loop, use
  variable
These functions accomplish the same thing as a FOR–NEXT loop in BASIC:
 variable = initial–value  final–value  increment
.
.
.
 variable
A DSE instruction is like a FOR–NEXT loop with a negative increment.
After pressing a shifted key for ISG or DSE (
  or   ), you will be
prompted for a variable that will contain the loop–control number (described
below).
The Loop–Control Number
The specified variable should contain a loop–control number ±ccccccc.fffii, where:
 ±ccccccc is the current counter value (1 to 12 digits). This value changes with
loop execution.
 fff is the final counter value (must be three digits). This value does not change
as the loop runs.An unspecified value for fff is assumed to be 000.

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