VBSCRIPT OTHER FUNCTIONS

Other Functions:

1.       Create Object-creates an object of a specified type.

Syntax: CreateObject(servername.typename[,location])

Servername-Required. The name of the application that provides the object

typename-Required. The type/class of the object

location-Optional. Where to create the object

2.       Eval-evaluates an expression, like a function, and returns the result.

Syntax-Eval(expression)

Example-function myFunction()
response.write("Hello world")
end function

eval("myFunction()")

Output-Hello world

3.       IsEmpty-returns a Boolean value that indicates whether a specified variable has been initialized or not. It returns true if the variable is uninitialized; otherwise, it returns False.

Syntax: IsEmpty(expression)

Example: Dim x
         response.write(IsEmpty(x) & "<br />")
         x=10
        response.write(IsEmpty(x) & "<br />")
        x=Empty
        response.write(IsEmpty(x) & "<br />")
        x=Null
        response.write(IsEmpty(x))

Output: True
        False
        True
        False

4.       IsNull-returns a Boolean value that indicates whether a specified expression contains no valid data (Null). It returns True if expression is Null; otherwise, it returns False.

Syntax: IsNull(expression)

Example: Dim x
response.write(IsNull(x) & "<br />")
x=10
response.write(IsNull(x) & "<br />")
x=Empty
response.write(IsNull(x) & "<br />")
x=Null
response.write(IsNull(x))

Output:

False
False
False
True

5.       IsNumeric-returns a Boolean value that indicates whether a specified expression can be evaluated as a number. It returns True if the expression is recognized as a number; otherwise, it returns False.

Syntax: IsNumeric(expression)

Example:

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))

Output:

True
True
False
True
False

6.       Round-rounds a number.

Syntax: Round(expression[,numdecimalplaces])

Expression-Required. The numeric expression to be rounded

Numdecimalplaces-Optional. Specifies how many places to the right of the decimal are included in the rounding. Default is 0

Example:

response.write(Round(24.13278) & "<br />")
response.write(Round(24.75122))

Output:

24
25

7.       TypeName-returns the subtype of a specified variable.

The TypeName function can return one of the following  values:Byte,Integer,Long,Single,Double,Currency,Decimal,Date,String,

Boolean,Empty,Null,<object type> ,Object,Unknown,Nothing,Error

Syntax: TypeName(varname)

Example:

x="Hello World!"
response.write(TypeName(x) & "<br />")

Output:

String

8.       VarType-returns a value that indicates the subtype of a specified variable.

The VarType function can return one of the following values:

• 0 = vbEmpty - Indicates Empty (uninitialized)
• 1 = vbNull - Indicates Null (no valid data)
• 2 = vbInteger - Indicates an integer
• 3 = vbLong - Indicates a long integer
• 4 = vbSingle - Indicates a single-precision floating-point number
• 5 = vbDouble - Indicates a double-precision floating-point number
• 6 = vbCurrency - Indicates a currency
• 7 = vbDate - Indicates a date
• 8 = vbString - Indicates a string
• 9 = vbObject - Indicates an automation object
• 10 = vbError - Indicates an error
• 11 = vbBoolean - Indicates a boolean
• 12 = vbVariant - Indicates a variant (used only with arrays of Variants)
• 13 = vbDataObject - Indicates a data-access object
• 17 = vbByte - Indicates a byte
• 8192 = vbArray - Indicates an array

Syntax: VarType(varname)

Example:

x="Hello World!"
response.write(VarType(x) & "<br />")

Output:

8  ScriptEngine-returns the scripting language in use.

This function can return one of the following strings:

• VBScript - Indicates that Microsoft Visual Basic Scripting Edition is the current scripting engine
• JScript - Indicates that Microsoft JScript is the current scripting engine
• VBA - Indicates that Microsoft Visual Basic for Applications is the current scripting engine

Syntax:

ScriptEngine

Example:

response.write(ScriptEngine & "<br />")

Output:

VBScript