JS - 格式编号，带小数点后2位未舍入 [英] JS - Format number with 2 decimal not rounded

问题描述

我会格式化一个带有2位小数的数字而不进行舍入。
所以我排除了toFixed（）函数。

I would format a number with 2 decimal places without rounding. So I excluded the toFixed() function.

我试过这种方式

a = 1,809999
b = 27,94989

a = Math.floor(a * 100) / 100; --> 1,8
b = Math.floor(b * 100) / 100; --> 27,94

OR

a = Number(a.toString().match(/^\d+(?:\.\d{0,2})?/)); --> 1,8
b = Number(b.toString().match(/^\d+(?:\.\d{0,2})?/)); --> 27,94

不幸的是，a的第二个小数是零，这被删除了，我怎么能保持它并且= 1.80？
谢谢

Unfortunately, the second decimal of a is zero, and this was deleted, how could I do to keep it and have a = 1.80? Thank you

推荐答案

(Math.floor(a * 100) / 100).toFixed(2);

使用toFixed（2）！

With toFixed(2) !

JSFIDDLE DEMO

JSFIDDLE DEMO

这篇关于JS - 格式编号，带小数点后2位未舍入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！