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

<h1>JavaScript Math.ceil()</h1>

<p>Math.ceil() 把数字上舍入为最接近的整数:</p>

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

<script>
document.getElementById("demo").innerHTML = Math.ceil(4.4);
</script>

</body>
</html>
运行结果: