#816 – Named Argument and Optional Parameter Combinations

You use named arguments (vs. positional) to reverse the order of arguments passed in to a method when you call it.

You use optional parameters (vs. required) to to allow omitting an argument for that parameter when you call the method.

Options include:

• No named arguments, no optional parameters – you must pass in a value for each parameter, in the proper order
• Named arguments only – you must pass in an argument for each parameter, but you can change the order of the arguments.  Named arguments must follow positional arguments.
• Optional parameters only – you must pass arguments in the correct order, but may omit one or more arguments if the corresponding parameter is optional.  If you omit an argument for one parameter, you must omit arguments for all parameters that follow that parameter.
• Named arguments and optional parameters – you can supply any combination of arguments, in any order