The use of arguments in JavaScript

Source: Internet
Author: User

function Add (n1,n2) {
return n1+n2;
function Add (n1,n2,n3) {
return n1+n2+n3;
alert (add); The//nan,js method uses the nearest principle, and since the method does not pass in N3, the result is NaN

JS there is no method overload, how to solve the above problem?

Function F1 () {
var sum=0;
for (Var i=0;i<arguments.length;i++) {
return sum;
Alert (F1 (1,2,3,4,5));

Using arguments, the calculation of chestnuts plus numbers and
function ff (name) {
var sum=0;
for (Var i=1;i<arguments.length;i++) {
return arguments[0]+sum;
Alert (FF (' chestnut ', 1,2,3,4,5));//Chestnut 15

Name, age
function test (name,age) {
if (!age) {//age No parameter is passed, age is undefined
Alert (' The name is ' +name+ ' age is ' +age ');
Test (' Xiao Ming ');//name is Xiaoming age is 18

The use of arguments in JavaScript

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