function sum(){
var s =0;
(定义一个变量)
for(var i=0; i<arguments.length;i++){
如果小于(实参的长度)进行循环
s= s + arguments[i]
实参从第0位开始相加
}
console.log(s);
}
sum(1,2,3);
sum(1,2,3,5,6);
sum(1,2,3,4);
Use of arguments
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Origin blog.csdn.net/qq_26705343/article/details/111396291
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