C# optional parameter

In this called function, no argument is defined with the “Optional” keyword, so when an argument is not passed in the calling function, we see the error message “Argument not Optional.” In order to resolve this, we need to either pass the parameter in the calling function or mark the rollno argument as optional .

When you call a procedure with an optional parameter, you can choose whether to supply the argument . If you do not, the procedure uses the default value declared for that parameter. When you omit one or more optional arguments in the argument list, you use successive commas to mark their positions.

When you call a procedure with an optional parameter, you can choose whether to supply the argument . If you do not, the procedure uses the default value declared for that parameter. When you omit one or more optional arguments in the argument list, you use successive commas to mark their positions.

You can define Python function optional arguments by specifying the name of an argument followed by a default value when you declare a function . You can also use the **kwargs method to accept a variable number of arguments in a function. To learn more about coding in Python, read our How to Learn Python guide.

You can define Python function optional arguments by specifying the name of an argument followed by a default value when you declare a function . You can also use the **kwargs method to accept a variable number of arguments in a function. To learn more about coding in Python, read our How to Learn Python guide.