Do / Loop

Syntax Variations¶

Pre‑test loop

Do While <condition>
  ' body
Loop

2. Pre‑test with Until

Do Until <condition>
  ' body
Loop

3. Post‑test loop

Do
  ' body
Loop While <condition>

4. Post‑test with Until

Do
  ' body
Loop Until <condition>

Description¶

Do While and Do Until check the condition before the first iteration.
Loop While and Loop Until check after running the body at least once.
Use Loop Until to exit when a condition becomes True, or Loop While to continue while True.

Example¶

' Read input until a blank line is entered
Dim line As String

Do
  line = Input("Enter text (blank to quit):")
  If line <> "" Then Print("You entered: " + line)
Loop Until line = ""