Command of the day:WHILE...WEND

[gaslouk]

Ηι

WHILE...WEND

[tsh73]

While condition
'with possible [exit while]
wend

is exactly the same as

do While condition
'with possible [exit do]
loop

Just an older form.
So Command of the day:Do....Loop
covers it all.

[Walt Decker]

'
A = 1
WHILE A < 20
 A = A + 1
WEND
PRINT "WHILE "; A

A = 50
WHILE A > 20
 A = A - 1
WEND

PRINT "WHILE "; A

A = 1

DO UNTIL A > 20
 A = A + 1
LOOP
PRINT "DO UNTIL "; A

DO
 A = A - 1
LOOP UNTIL A < 10
PRINT "LOOP UNTIL "; A

A = 50
DO WHILE A > 20
 A = A - 1
LOOP
PRINT "DO WHILE "; A

DO
 A = A + 1
LOOP WHILE A < 50

PRINT "LOOP WHILE "; A

END
'

WHILE and DO can directly use the result from a function, e. g.

WHILE FN.DoSomething(SomeValue) = 0
WHILE FN.DoSomething(DomeValue) > SomeNumber
WHILE FN.FetchString$(A.String$) <> ""

DO UNTIL FN.DoSomething(SomeValue) = 0
DO UNTIL FN.FetchString$(A.String$) <> ""
DO WHILE FN.DoSomething(SomeValue) = 0

DO
LOOP WHILE FN.DoSomething(SomeValue) = 0

DO
LOOP UNTIL FN.FetchString$(A.String$) <> ""

WHILE, DO, and FOR/NEXT can be nested, e. g.

'WHILE 1
 DO UNTIL
   WHILE 2
     FOR I = 0 TO SomeNumber
     NEXT I
   WEND
 LOOP
'WEND

DO NOT USE GOTO to exit any loop. Use EXIT FOR, EXIT WHILE, EXIT DO instead.
If the loop is in a SUB/FUNCTION you can use EXIT SUB or EXIT FUNCTION within a loop structure.