Program Execution - Radio Shack TRS-80 PC-4 Owner's Manual

sure to use it to clearly designate the end location .
• The spacing between the line numbers and commands and between commands and
operands, facilitates reading the display. In BASIC language the spacing has no
special meaning (except for a PR INT statement message) and may normally be
omitted .
• In this program, line n'umbers have been divided into increments of 10 but they may
be freely used within a range of
1
through
9999.
However, it is more convenient for
subsequent addition/insertion if they are divided into increments of 10.
Since program execution is performed in sequence from lower numbers to higher
numbers, use line numbers in the desired execution sequence.
• To clear the program in one program area, use a CLEAR command. To clear all the
programs in areas P0 through P9, use a CLEAR A command.
5-3-2 Program Execution
Program execution is performed in the RUN mode. (Press l!il[@) and "RUN" will be
displayed.)
There are 2 methods for executing a program which has been written.
1. Program execution method
CD
Execution using program area designation
For this method, execution begins as soon as the program area is designated.
~
{ !}
(Press
~
then press the desired program area.J
Example:
To start the program in the previous example
Operation:
ff!illJ
~
RUN mode
!
(omitted hereafter)
~
I
?
* This "? " is displayed because an
INPUT statement is written in the
program as the first step.
®
Execution using a RUN command
RUN
lID
("RUN" may be input by pressing either
001]]00.
or ~cID
lED .)
*
When performing Execution using a RUN command as in the previous example, a
") " is displayed. When the program is in an input await condition,
"? "
will not
be released even if
mB
is pressed. You must press
~~
then perform operation
®
to re-input data.
Also, to begin execution in the middle of the program, input the desired Iine number
after the RUN command and press the
lID
Key.
-32- .