代码示例:(标识:js_bitwise_left)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 位左移</h1>

<h2>&lt;&lt; 运算符</h2>

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

<script>
document.getElementById("demo").innerHTML = 5 << 1;
</script>

</body>
</html>
运行结果: