How can we make a parameter of a functional optional?
Use the *args parameter to make arguments optional
- def f(a, b, *args): Create function with `*args`
- arguments = (a, b) + arguments.
- print (arguments)
- f(1, 2) Call `f` with no optional arguments.
- f(1, 2, 3, 4) Call `f` with optional arguments `3` and `4`
Table of Contents
Are command line arguments optional?
A command is broken into an array of strings called arguments. Argument 0 is (usually) the name of the command, argument 1 the first element following the command, and so on. An option is a documented type of argument that modifies the behavior of a command, eg -l commonly means “long”, -v verbose.
How do you send an optional parameter in Python?
You can define optional arguments to Python functions by specifying an argument name followed by a default value when you declare a function. You can also use the **kwargs method to accept a variable number of arguments to a function.
What are the optional arguments to a function in Python?
Let’s say you have a function that takes three arguments or parameters name, number and age as input. If you want to call the personaldetails function, you must pass all 3 parameters as input to that function.
Where do optional arguments go in JavaScript?
The following methods allow you to place optional arguments anywhere. All JavaScript functions are passed an implicit argument variable when they are called. arguments is an array containing the values of all the arguments passed to the function.
What to do when you omit optional parameters?
When you omit one or more optional arguments in the argument list, you use successive commas to mark their positions. The following example call supplies the first and fourth arguments, but not the second or third: The following example makes multiple calls to the MsgBox function. MsgBox has one required parameter and two optional parameters.
How to specify optional parameters in Visual Basic?
Optional Parameters (Visual Basic) You can specify that a procedure parameter is optional and that no arguments be supplied to it when the procedure is called. Optional parameters are indicated by the Optional keyword in the procedure definition.