Excel VBA IsNull Function
VBA IsNull Function: The IsNull function in VBA returns a Boolean, indicating whether a supplied expression is Null.
Syntax
IsNull (Expression)
Parameter
Expression (required)- This parameter represents the name of the argument that you want to check.
Return
This function returns a Boolean value True if the specified expression is null else it returns False if the argument has been supplied.
Example 1
Sub IsNull_Example1() Dim var Dim is_Null As Boolean var = 15 is_Null = isNull(var) ' The isNull1 variable returns a boolean value False. Cells(1, 1).Value = ("The isNull function returns ") Cells(1, 2).Value = is_Null End Sub
Output
The isNull function returns | FALSE |
Example 2
Sub IsNull_Example2() Dim var Dim is_Null As Boolean 'passing var as Null var = Null is_Null = isNull(var) ' The isNull1 variable returns a boolean value TRUE. Cells(1, 1).Value = ("The isNull function returns ") Cells(1, 2).Value = is_Null End Sub
Output
The isNull function returns | TRUE |
Example 3
Sub IsNull_Example3() Dim var Dim is_Null As Boolean 'var will be initialized with default value is_Null = isNull(var) ' The isNull1 variable returns a boolean value False. Cells(1, 1).Value = ("The isNull function returns ") Cells(1, 2).Value = is_Null End Sub
Output
The isNull function returns | FALSE |