html运行实例（eg_js_loop_for

代码示例：（标识：eg_js_loop_for_5）

<!DOCTYPE html>
<html>
<body>

<p id="demo"></p>

<script>
var cars = ["BMW", "Volvo", "porsche", "Ford"];

var i = 0;
var len = cars.length;
var text = "";

for (; i < len; ) {
  text += cars[i] + "<br>";
  i++;
}
document.getElementById("demo").innerHTML = text;
</script>

</body>
</html>