HP (Hewlett-Packard) F2215AA#ABA Calculator User Manual


 
Programming Techniques 14-17
This routine is an example of an infinite loop. It can be used to collect the initial
data. After entering the three values, it is up to you to manually interrupt this loop by
pressing
label line number to execute other routines.
Conditional Loops (GTO)
When you want to perform an operation until a certain condition is met, but you
don't know how many times the loop needs to repeat itself, you can create a loop
with a conditional test and a GTO instruction.
For example, the following routine uses a loop to diminish a value A by a constant
amount B until the resulting A is less than or equal to B.
Program lines:
(In RPN mode)
Description:
 
 
 
  It is easier to recall A than to remember where it is in the
stack.
  Calculates AB.
  Replaces old A with new result.
  Recalls constant for comparison.
  Is B < new A?
   Yes: loops to repeat subtraction.
  No: displays new A.
 
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