判断语句
大部分和 Lua 差不多,多了一个 Switch 语句
循环
For 循环
多次执行一系列语句,缩写管理循环变量的代码。
For i = start To end [Step X]...Next
Private Sub Constant_demo_Click()
Dim a As Integer
a = 10
For i = 0 To a Step 2
MsgBox ("The value is i is : " & i)
Next
End Sub
For Each 循环
主要用于数组,如果组中至少有一个元素并为组中的每个元素重复执行,则执行此操作。
For Each element In Group
[statement 1]
[statement 2]
....
[statement n]
[Exit For]
[statement 11]
[statement 22]
Next
Private Sub Constant_demo_Click()
'fruits is an array
fruits = Array("苹果", "橙子", "樱桃")
Dim fruitnames As Variant
'iterating using For each loop.
For Each Item In fruits
fruitnames = fruitnames & Item & Chr(10)
Next
MsgBox fruitnames
End Sub
While ... Wend 循环
在执行循环体之前测试条件
Private Sub Constant_demo_Click()
Dim a As Integer
a = 10
For i = 0 To a Step 2
MsgBox ("The value is i is : " & i)
Next
End Sub
Do...While循环
只要条件为 True 就会被执行(即,)循环应该被重复直到条件为 False。
相当于 Lua 中的 while true do ... end
Private Sub Constant_demo_Click()
Do While i < 5
i = i + 1
msgbox "The value of i is : " & i
Loop
End Sub
do…until 循环
只要条件是 False,do..Until 语句就会被执行(即,)循环应该被重复直到条件为真。
循环控制
相当于 Lua 中的 break
Exit For 语句
Private Sub Constant_demo_Click()
Dim a As Integer
a = 10
For i = 0 To a Step 2
'i is the counter variable and it is incremented by 2
MsgBox ("The value is i is : " & i)
If i = 4 Then
i = i * 10
'This is executed only if i=4
MsgBox ("The value is i is : " & i)
Exit For 'Exited when i=4
End If
Next
End Sub
Exit Do 语句
Private Sub Constant_demo_Click()
i = 0
Do While i <= 100
If i > 10 Then
Exit Do ' Loop Exits if i>10
End If
MsgBox ("The Value of i is : " & i)
i = i + 2
Loop
End Sub