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Simple Programming
Program Stops
At times a mistake of some kind in your program will stop program
execution. To help you identify why the calculator stopped in the middle
of your program, possible reasons are listed below.
Executing a R/S. The execution of a
instruction in a program
halts program execution at the line following the (R/S].
Executing Line 00. Whenever line 00 is executed in a program, pro-
gram execution stops at line 00 unless it is part of a subroutine, in which
case it does a return.
Pressing Any Key. Pressing any key halts program execution. Be
careful to avoid pressing keys during program execution.
The calculator has been designed so that program execution will not
halt in the middle of a digit entry sequence. If you press any key while
a number is being placed in the X-register by a running program, the
entire number will be ''written'" and the following step will be executed
by the program before the program halts.
When a program is halted, you can resume execution by pressing
from the keyboard in RUN mode. When you press
, the program
resumes execution with the next step as though it had never stopped
at all.
Error Stops
If the calculator attempts to execute any error-causing operation (see
Error Indications) during a running program, execution immediately
halts and the calculator displays the word Error and a number. To see
the line number and keycode of the error-causing instruction, you can
briefly set the calculator to PRGM mode.
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