About the number of JavaScript parameters and their invocation problems

JavaScript inside the function parameters are arguments objects, if there are formal parameters, then you can use the formal parameters as arguments object properties, call formal parameters, can be used for property names, such as: function fuck (one, two) {          alert (one);     alert (both);          You can also use the arguments object's subscript function fuck () {alert (arguments[0]);     Alert (arguments[1]);      You can have n arguments when calling a function, and it doesn't matter how much you want to write, such as: Fuck ("A", "B", "C"), or, of course, one that does not write, such as: fuck (); So when fuck () is called, the formal parameters that are not initialized will be undefined, and the output will of course be undefined.

About the number of JavaScript parameters and their invocation problems