VBScript IsEmpty function
May 13, 2021 VBScript
Table of contents
VBScript IsEmpty function
The VBScript IsEmpty function returns a Boolean value.
Complete VBScript reference manual
The IsEmpty function returns a Boolean value indicating whether the specified variable has been initialized. True is returned if the variable is not initialized, otherwise False is returned.
Grammar
IsEmpty(expression)
| parameter | describe |
|---|---|
| expression | Required.An expression (usually a variable name). |
<script type="text/vbscript">
Dim x
document.write(IsEmpty(x) & "<br />")
x=10
document.write(IsEmpty(x) & "<br />")
x=Empty
document.write(IsEmpty(x) & "<br />")
x=Null
document.write(IsEmpty(x))
</script>
Dim x
document.write(IsEmpty(x) & "<br />")
x=10
document.write(IsEmpty(x) & "<br />")
x=Empty
document.write(IsEmpty(x) & "<br />")
x=Null
document.write(IsEmpty(x))
</script>
The above example output results:
True
False
True
False
False
True
False
Try it out . . .
Complete VBScript reference manual