Definition and Usage
定义与用法

The round() method rounds a number to the nearest integer.
round()方法将数字四舍五入成最接近的整数。

Syntax
语法

Math.round(x)

Example
举例

In this example we will round different numbers with the round() method:
在这个举例中我们通过round()方法将不同的数字四舍五入了：

<script type="text/javascript">

document.write(Math.round(0.60) + "<br />")
document.write(Math.round(0.50) + "<br />")
document.write(Math.round(0.49) + "<br />")
document.write(Math.round(-4.40) + "<br />")
document.write(Math.round(-4.60))

</script>

The output of the code above will be:
返回的结果为：

1
1
0
-4
-5

Try-It-Yourself Demos
尝试与演示

round()
How to use round().
怎样使用round()

评论 (0) All