VBScript 巢狀 If 語句

在另一個 If 或 ElseIf 語句內部的 If 或 ElseIf 語句。內部 If 語句根據最外部 If 語句執行。這使得 VBScript 能夠輕鬆處理複雜的條件。

語法

VBScript 中巢狀 if 語句的語法為 −

If(boolean_expression) Then
   Statement 1
	.....
	.....
   Statement n
   If(boolean_expression) Then
      Statement 1
		.....
		.....
	  Statement n
   ElseIf (boolean_expression) Then
      Statement 1
		.....
		....
      Statement n
   Else
	   Statement 1
		.....
		....
	   Statement n
   End If
Else
   Statement 1
	.....
	....
   Statement n
End If

示例

<!DOCTYPE html>
<html>
   <body>
      <script language = "vbscript" type = "text/vbscript">
         Dim a
         a = 23

         If a > 0 Then
            Document.write "The Number is a POSITIVE Number"
            If a = 1 Then
               Document.write "The Number is Neither Prime NOR Composite"   
            Elseif a = 2 Then
               Document.write "The Number is the Only Even Prime Number"   
            Elseif a = 3 Then
               Document.write "The Number is the Least Odd Prime Number"   
            Else
               Document.write "The Number is NOT 0,1,2 or 3"   
            End If
         ElseIf  a < 0 Then
            Document.write "The Number is a NEGATIVE Number"
         Else
            Document.write "The Number is ZERO"
         End If
      </script>
   </body>
</html>

執行以上程式碼後，產生以下結果 −

The Number is a POSITIVE Number
The Number is NOT 0,1,2 or 3

vbscript_decisions.htm

列印頁面