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Other FOR ~ NEXT statements can be used (nested) within the FOR ~ NEXT
statement. In this case, each <variable> to be set should be different. One FOR ~
NEXT statement should be completely included in the other FOR ~ NEXT statement.
Ex.)
<Proper> <Wrong>
FOR I=1 TO 5 FOR I=1 TO 5
FOR J=1 TO 5 FOR J=1 TO 5
NEXT J NEXT I
NEXT I NEXT J
If FOR ~ NEXT statements are terminated at the same point, their NEXT statements
can be described in one statement as shown below.
Ex.) FOR I=1 TO 10
FOR J=1 TO 10
FOR K=10 TO 1 STEP-1
NEXT K,J,I
When <variable> is omitted in the NEXT statement, the NEXT statement pairs off
with the nearest FOR statement. If the NEXT statement is executed before the paired
FOR statement, a “NEXT Without FOR” error occurs.
<initial value> and <terminal value> are determined by the first FOR statement.
Ex.) I=10
FOR I=I TO I+5
NEXT
A loop is performed within the range of “I = 10 to 15”.