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VBScript IsNumeric 函数


❮ VBScript 参考大全

IsNumeric 函数返回一个布尔值,指示指定的表达式是否可以计算为数字。如果表达式被识别为数字,则返回 True;否则返回 False。

注意:如果表达式是日期,则 IsNumeric 函数将返回 False。

语法

IsNumeric(expression)

参数 描述
expression 必需。表达式

示例

示例

<%

Dim x
x=10
response.write(IsNumeric(x) & "<br />")
x=Empty
response.write(IsNumeric(x) & "<br />")
x=Null
response.write(IsNumeric(x) & "<br />")
x="10"
response.write(IsNumeric(x) & "<br />")
x="911 Help"
response.write(IsNumeric(x))

%>

以上代码的输出将是

True
True
False
True
False
显示示例 »

❮ VBScript 参考大全
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