js里面如何实现把数字拆分成开 var i="1234.3"; 拆成var q="1";var q="2";var q="3";var q="4";varvar i="1234.3"for(var j=0j<i.lengthj++){var q = i.substring(j,j+1)if(q!="."){alert(2023-02-22JavaScript100