JavaScript function parameter undefined

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.

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.

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.10 Haz 2019

A method that contains optional parameters does not force to pass arguments at calling time . It means we call method without passing the arguments. The optional parameter contains a default value in function definition. If we do not pass optional argument value at calling time, the default value is used.

A method that contains optional parameters does not force to pass arguments at calling time . It means we call method without passing the arguments. The optional parameter contains a default value in function definition. If we do not pass optional argument value at calling time, the default value is used.