Specifications

Chapter 3. Program Structure

3.1.2 Notes for Jumping into/out of Statement Blocks

It is not recommended to jump control from a main routine or subroutines into the midst of sig-

nificant statement blocks or to jump out from the midst of those statement blocks, using the

GOTO statement.

✕ : To be avoided. A run-time error may occur.

▲: Not recommended, although no run-time error will result directly. Nesting may

cause a run-time error.

• It is possible to jump control out of the midst of block-structured statements

(except for

FOR...NEXT) by using the GOTO statement.

• Avoid jumping the control out of the midst of

FOR...NEXT statement block with the

GOTO statement. The program given below, for example, should be avoided.

FOR I%=0 TO 10

IF I%=5 THEN

GOTO AAA

ENDIF

NEXT I%

AAA

Statement Blocks Jump into Jump out

Subroutine ✕ ✕

Error-/event-handling routine ✕ ✕

Block-format user-defined function ✕ ✕

Block-structured statement ✕ ▲

NOTE

Generally, the frequent or improper use of GOTO statements in a program will

decrease debugging efficiency and might cause fatal run-time errors. You are, there-

fore, recommended to avoid using GOTO statements, if possible.