Syntax
WHILE expr
…
WEND
Description
The WHILE and WEND verbs work together to create a program loop:
1000 WHILE A<B
1010 .
1020 .
1030 .
1040 WEND
WHILE/WEND constructs can be used alone on lines or within compound
statements.
The loop repeats as long as the WHILE condition is true. If the WHILE condition
is initially false, the loop is skipped. Multiple WHILE .. WEND loops
may be nested.
Because WHILE .. WEND uses the same stack as FOR .. NEXT and GOSUB, active
WHILE .. WEND loops must use an EXITTO verb to exit, similar to jumping
out of FOR .. NEXT loops.
PRO/5 also supports the looping construct REPEAT
.. UNTIL.