最新 Javascript练习基础

来源：互联网发布：js如何获取classname 编辑：程序博客网时间：2024/05/16 04:46
// 100以内的数求和var sum = 0;for (i = 1; i<= 100; i++){    sum = sum + i}console.log(sum)
//判断 奇数 偶数var sum = 0,avg;for (var i = 1; i <= 100; i ++){    sum += i;}avg = sum /100;console.log(avg)var ecenSum = 0;   //偶数var oddSum = 0;   // 基数for(var i = 1; i <= 100;i++){    //判断基数偶数    if (i % 2== 0){        //偶数        ecenSum += i;    }else{        //基数        oddSum += i;    }}console.log(ecenSum);console.log(oddSum)



    //本金 加利息var money = 10000; //本金var reat = 0.003;  //年利率for (var i = 0; i < 5; i++){    money = money + money* reat;}console.log(money)var n1 = 1;var n2 = 1;for(var i = 3; i <= 12; i++){    sum = n1 + n2;    n1 = n2;    n2 = sum;}console.log(n1);console.log(n2);


// 9x9乘法表 document.write("<table border='1px' cellpadding='0' cellpacing='0'>"); for (var i = 1;i <= 9;i++){     //外循环 控制行     document.write("<tr>");     for (var j = 1; j<=i; j++){         document.write("<td>")         document.write(i + "*" + j + "=" + i*j);         document.write("</td>")     }     document.write("</tr>") }


//打印正方形for (i = 0; i < 10; i++){    //最外层循环 控制行    for (var j = 0; j < 10; j++){        document.write("☆")    }    //换行      document.write("<br />");}


// 打印三角形for (i = 0;i<10;i++){    //最外层循环 控制行     for (var j = 0;j < i;j ++){         document.write("☆");     }     //换行    document.write("<br />")}
阅读全文
0 0