| Navigation: Language Reference > 12 - Execution Control > Execution Control Statements >====== BREAK (immediately leave loop) ====== |    |
BREAK [ label ]
| BREAK | Transfers control to the first statement following the terminator of a LOOP or ACCEPT structure. |
| label | The label on the LOOP or ACCEPT statement from which to break. This must be the label of a nested loop structure containing the BREAK statement. |
The BREAK statement immediately terminates processing in the LOOP or ACCEPT structure and transfers control to the first statement following the terminating END, WHILE, or UNTIL statement of the LOOP, or the terminating END statement of the ACCEPT structure.
BREAK may only be used in a LOOP or ACCEPT loop structure. The use of the optional label argument allows you to cleanly break out of multiple levels of nested loops, eliminating one common use of GOTO.
Example:
LOOP !Loop
ASK !wait for a keystroke
IF KEYCODE() = EscKey !if Esc key pressed
BREAK !break out of the loop
ELSE !otherwise
BEEP !sound the alarm
END
END
Loop1 LOOP !Loop1 is the label
DO ParentProcess
Loop2 LOOP !Loop2 is the label
DO ChildProcess
IF SomeCondition
BREAK Loop1 !Break out of both nested loops
END
END
END
ACCEPT !ACCEPT loop structure
CASE ACCEPTED()
OF ?Ok
CallSomeProc
OF ?Cancel
BREAK !break out of the loop
END
END
See Also: