JavaScript列表遍历为什么返回undefined？？？

Question

var youjunList["bk_polysemy","31713","34689","lego_tpl","sigma_celebrity_rela","www_jingyan_normal","www_normal","10"]; for(var j = 0 , youjunListLen = youjunList.length; j < youjunList; j++) { console.log(youjunList[j]); }

Answer 1

  aaa() {

    var dc=["bk_polysemy", "31713", "34689", "lego_tpl", "sigma_celebrity_rela", "www_jingyan_normal", "www_normal", "10"];

    for (let j = 0;  j <  dc.length; j++) {

      console.log(dc[j]);

    }

  },