javascript/code/4.html

<!--
 * @Author: xiongxinwei 3293172751nss@gmail.com
 * @Date: 2022-07-15 11:26:25
 * @LastEditors: xiongxinwei 3293172751nss@gmail.com
 * @LastEditTime: 2022-07-16 19:38:34
 * @FilePath: \code\4.html
 * @Description: 
 * 
 * 
-->
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <meta name="viewpport" content="width=device-width,initial-sacle=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>4.heml</title>
    <script>
    function fn(num1,num2) {
	    return num1,num2; 
       //return [num1+num2,num1-num2];
    }
    function fn2(num1,num2,a) {
	    //return num1,num2; 
       return [num1+num2,num1-num2];
    }
    var re = fn(123,123);
    var re1 = fn2(123,12123);
    alert(re);
    alert(re1);

    var x = 123129;
    alert("x="+x);
    x = (0 + x)<<100;
    y = x ** 100;
    alert("x="+x);   //x=1970064
    alert("y="+y);   //y=Infinity
    function fn3(){
        var max = 0;
        var min = (0 + arguments.length)>>1;
        alert(min);
        for(var i=0;i<arguments.length;i++){
            if(max<arguments[i]){
                max = arguments[i];
            }
        }
        console.log(arguments); //arguments里面存储所有传进来的实参
        console.log(arguments.length)   //1. 具有数组的长度
        console.log(arguments[2]);   
        return max;
    }
    a = fn3(123,1231,12,3,1,2,3,2);
    b = fn3(123,123,1,3,1,3,1,23,234,12);
    alert(a);
    alert(b);
    </script>
</head>
<body>
</body>
</html>