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Cory Smith edited this page Jun 8, 2022 · 5 revisions

The WHILE...WEND statement is used to repeat a block of statements while the condition is met.

Syntax

WHILE condition . . . WEND

Description

  • condition is a numeric expression used to determine if the loop will execute.
  • statements will execute repeatedly while condition is a non-zero value.
  • EXIT WHILE can be used for emergency exits from the loop in QB64 only.
  • A DO...LOOP can use the same DO WHILE condition to get the same results.
  • WHILE loops only run if the WHILE condition is True.

Example(s)

Example 1: Reading an entire file. Example assumes the program has a OPEN as #1

  
OPEN "Readme.txt" FOR INPUT AS #1
WHILE NOT EOF(1)
    _LIMIT 1                                    'limit line prints to one per second 
    LINE INPUT #1, text$
    IF INKEY$ = CHR$(27) THEN EXIT WHILE        'ESC key exits
    PRINT text$
WEND 

Example 2: Clearing the keyboard buffer.

WHILE INKEY$ <> "" : WEND 

See Also

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