html运行实例（eg_js_let_for_loop

代码示例：（标识：eg_js_let_for_loop_1）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript let</h1>

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

<script>
var i = 5;
for (var i = 0; i < 10; i++) {
  // 一些语句
}
document.getElementById("demo").innerHTML = i;
</script>

</body>
</html>