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Set a break point in a Loop or a Macro. PAUSE returns control to user
when executed in a macro. The prompt is changed to indicate the execu-
tion level. Any valid command can be executed while in interrupt mode.
The execution can be resumed by typing CONTINUE, aborted by QUIT (or RE-
TURN, depending whether an error status is desired). NEXT may also be
used for the Loop.
If PAUSE is followed by an argument, this argument is typed when the
pause occurs. When typed in interactive, PAUSE generates a traceback of
the levels of execution in SIC.
A pause is generated after completion of the current command if you type
<^C> on the keyboard. This allows you to interrupt any sequence of com-
mands (even if ON ERROR CONTINUE has been typed).