js 循环 常用方法

$(function () {
    var num = ["1","2","3","4","5","6","7","8"];
    //for循环
    for(var i=0;i<num.length;i++){
        console.log("------------------for循环-------------------");
        console.log(num[i]);
    }
    //for in循环
    for(i in num){
        console.log("------------------for in循环-------------------");
        console.log(num[i]);
    }
    //$.each()方法（需引入jq才可以）
    $.each(num, function (i,item) {
        console.log("------------------$.each()-------------------");
        console.log(i,item);
    })
})