Optional Keyword

[Karok]

Can someone tell me what the default is for a variable that is declared as optional? For example:


Function Fun1(optional byval an_int as Integer)
Fun2(an_int)
End Function


Function Fun2(byval an_int as Integer)
' do something here with an_int
End Function





What will this pseudocode do?


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A man who asks a question is a fool for 15 minutes. A man who doesn't ask a question is a fool for a lifetime. -Chinese Proverb




Karok

[BYaman]

When you declare a optional parameter. You must set default value such as
Function Fun1(optional byval an_int as Integer=12)
If you don't
parameter value be zero.

[ramayansunil]

Hi,
The syntax for typed optional arguments allows you to specify a default value. If the argument is omitted when the procedure is called, then the argument will have the default value. Here u didnt specify the default value. The default value for the integer when declared will be 0. So it will take it as 0.
If u are declaring the variable as variant then u can use the IsMissing() function to find out whether the procedure is called with the argument or not.
Have a nice day.
sunil.