将浮点数转换为整数，在JavaScript中舍入到2位小数 [英] Converting floating point numbers to integers, rounding to 2 decimals in JavaScript

问题描述

在JavaScript中执行以下转换的最佳方法是什么？

1501.0099999999999909 - > 150101

12.00000000000001 - > 1200

解决方案

执行此操作的一种方法是使用 toFixed 方法关闭一个数字加上 parseFloat 。

例如，

  var number = 1501.0099999999999909; 
 var truncated = parseFloat（number.toFixed（5））; 
 console.log（截断）; 
  

toFixed 取小数点它应该被截断。

为了得到你需要的输出，你只需要`toFixed（2）'和多个结果乘以100。例如，b
$ b

  var number = 1501.0099999999999909; 
 var truncated = parseFloat（number.toFixed（2））* 100; 
 console.log（截断）; 
  

What's the best way to perform the following conversions in JavaScript? I have currencies stored as floats that I want rounded and converted to integers.

1501.0099999999999909 -> 150101

12.00000000000001 -> 1200

解决方案

One way to do this is to use the toFixed method off a Number combined with parseFloat.

Eg,

var number = 1501.0099999999999909;
var truncated = parseFloat(number.toFixed(5));
console.log(truncated);

toFixed takes in the number of decimal points it should be truncated to.

To get the output you need, you would only need `toFixed(2)' and multiple the result by 100.

Eg,

var number = 1501.0099999999999909;
var truncated = parseFloat(number.toFixed(2)) * 100;
console.log(truncated);

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