Radio Shack TRS-80 PC-3 Owner's Manual page 168

1 STOP
Abbreviations: S., ST., STO.,
See also: END, CONT command
Purpose
The STOP verb is used to halt execution of a program for diagnostic purposes.
Use
When the STOP verb is encountered in program execution, the PC-3 Computer execution halts and a message is displayed, such as
'BREAK IN 200' where 200 is the number of the line containing the STOP. STOP is used during the development of a program to
check the flow of the program or examine the state of variables. Execution may be restarted using the CaNT command. Pressing
the Left Arrow or Right Arrow keys after a STOP restores the display to its condition prior to the STOP.
Examples
10 STOP Causes "BREAK IN 10" to appear in the display.
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