Function arguments

We already know that the JavaScript functions can have parameters. However, the type of the parameters cannot be specified when creating a function. JavaScript neither performs any type checking on the parameter values passed nor validates the number of parameters when the function is called. So, for example, if a JavaScript function is taking two parameters, as shown in this code, we can even call it without passing any parameter value or by passing any type of the values or more values than the expected number of the parameters defined:

function execute(a, b) {
  //do something
}

//calling without parameter values
execute();

//passing numeric values
execute(1, 2);

//passing string values
execute("hello","world");

//passing more parameters
execute(1,2,3,4,5);

The missing parameters are set as undefined, whereas if more parameters are passed, these parameters can be accessed through the arguments object. The arguments object is a built-in object...