javascript - JavaScript 中循环的最后一次迭代

Question

我想做这样的事情:

for (var i=1; i<=10; i++) {
   document.write(i + ",");
}

它显示的结果如下:

1,2,3,4,5,6,7,8,9,10,

但是我想去掉最后一个“,”，结果应该是这样的:

1,2,3,4,5,6,7,8,9,10

Answer 1

您应该使用 .join 代替:

var txt = [];                          //create an empty array
for (var i = 1; i <= 10; i++) {
    txt.push(i);                       //push values into array
}

console.log(txt.join(","));            //join all the value with ","