在javascript中将数字四舍五入到小数点后一位 [英] Rounding a number to one decimal in javascript

问题描述

可能重复:
如何在Javascript中舍入到小数点后1位? /a>

Possible Duplicate:
How do you round to 1 decimal place in Javascript?

以下代码显示了在谷歌地图上显示的特定路线上的总行驶距离.我设法将数字从公里转换为英里.这是该函数的代码:

The following code, displays the total distance covered, on a particular route, displayed on google maps. I managed to convert the number from kilometers to miles. Here is the code for the function:

function computeTotalDistance(result) {
        var total = 0;
        var myroute = result.routes[0];
        for (i = 0; i < myroute.legs.length; i++) {
          total += myroute.legs[i].distance.value;
        }
        total = total *0.621371/ 1000.
        document.getElementById('total').innerHTML = total + ' mi';

总计显示为41.76483039399999 mi.如何将total舍入到小数点后一位?

The total is displayed as 41.76483039399999 mi. How would round off the total to one decimal place?

推荐答案

使用 toFixed :

var total = 41.76483039399999;
total = total.toFixed(1) // 41.8

这是小提琴: http://jsfiddle.net/VsLp6/

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