VBScript のループ制御、Do...Loop

x = 0
Do While x < 2
  MsgBox "Loop 1: " & x
  x = x + 1
Loop


x = 3
Do
  MsgBox "Loop 2: " & x
  x = x + 1
Loop While x < 2


x = 0
Do Until x > 2
  MsgBox "Loop 3: " & x
  x = x + 1
Loop


x = 3
Do
  MsgBox "Loop 4: " & x
  x = x + 1
Loop Until x > 2


Do While True
  MsgBox "Loop 5: "

  Exit Do
Loop