While / Wend

Syntax¶

While <condition>
  ' loop body
Wend

Description¶

• Evaluates <condition> before each iteration.
• If True, executes loop body and repeats.
• Terminates when <condition> becomes False.

Example¶

Dim n As Integer = 1

While n <= 5
  Print("Count: " + n.ToString)
  n += 1
Wend
' Outputs Count: 1 … Count: 5

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 = ""