VBScript UBound 函式

UBound 函式返回指定陣列的最大下標。因此，此值對應於陣列的大小。

語法

UBound(ArrayName[,dimension])

ArrayName，必需引數。此引數對應於陣列的名稱。
dimension，可選引數。此引數獲取一個整數值，該值對應於陣列的維度。如果為“1”，則它返回第一個維度的下界；如果為“2”，則它返回第二個維度的下界，依此類推。

示例

<!DOCTYPE html>
<html>
   <body>
      <script language = "vbscript" type = "text/vbscript">
         Dim arr(5)
         arr(0) = "1"            'Number as String
         arr(1) = "VBScript"     'String
         arr(2) = 100            'Number
         arr(3) = 2.45           'Decimal Number
         arr(4) = #10/07/2013#   'Date
         arr(5) = #12.45 PM#     'Time

         document.write("The Largest Subscript value of  the given array is : " & UBound(arr))

         ' For MultiDimension Arrays :
         Dim arr2(3,2)
         document.write(
            "The Largest Subscript of the first dimension of arr2 is : " & UBound(arr2,1) & "<br />")
         document.write(
            "The Largest Subscript of the Second dimension of arr2 is : " & UBound(arr2,2) & "<br />")

      </script>
   </body>
</html>

當上述程式碼另存為 .HTML 格式，並在 Internet Explorer 中執行後，它將產生以下結果 -

The Largest Subscript value of the given array is : 5
The Largest Subscript of the first dimension of arr2 is : 3
The Largest Subscript of the Second dimension of arr2 is : 2

vbscript_arrays.htm

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