How do I use optional in VBA?

VBA Procedure Calls Optional Arguments The Optional keyword indicates that this argument can be omitted. As mentioned before – any optional arguments introduced in the header must appear at the end, after any required arguments. In this function, if the argument for c isn’t supplied it’s value will default to “C” .

How do you make a parameter optional in VBA?

Rules governing the use of optional parameters:

  1. The Optional keyword must be present to make a parameter optional.
  2. The data type should be (but need not be, see below) a Variant data type.
  3. The optional parameter(s) must be at the end of the parameter list.

What does ByVal mean in VBA?

By Value
ByVal is a statement in VBA. ByVal stands for By Value i.e. when the subprocedure called in from the procedure the value of the variables is reset to the new value from the new procedure called in.

How do you pass an optional parameter to a function?

To declare optional function parameters in JavaScript, there are two approaches: Using the Logical OR operator (‘||’): In this approach, the optional parameter is Logically ORed with the default value within the body of the function. Note: The optional parameters should always come at the end on the parameter list.

What is ByRef and ByVal in VBA?

Using ByVal makes copies of the data, and the copy will only be accessible from within the called sub, while the original data can only be accessed and modified from within the calling sub. Conversely, ByRef allows you to access and modify the original data from both the calling and the called sub.

How do you add an optional parameter?

By Params Keyword: You can implement optional parameters by using the params keyword. It allows you to pass any variable number of parameters to a method. But you can use the params keyword for only one parameter and that parameter is the last parameter of the method.

What is ByVal target as range in VBA?

Private Sub Worksheet_Change(ByVal Target As Range) Target is passed as an argument when the event fires. It is the Range that changed and caused the event to fire. You can use it to run your code only when certain cells change.

What is optional parameter?

Optional parameters are defined at the end of the parameter list, after any required parameters. If the caller provides an argument for any one of a succession of optional parameters, it must provide arguments for all preceding optional parameters.

Is ByRef default in VBA?

ByRef (Default) Passing an argument by reference is the default. If you pass a variable defined as a user defined data type to a procedure, it must be passed by reference. Attempting to pass it by value will cause an error.

When adding optional parameters in a parameter list what is a valid requirement?

When adding optional parameters in a parameter list, what is a valid requirement? The parameters must appear to the right of all mandatory parameters.