Get decimal portion of a number with JavaScript

2018-06-06 22:23:09

I have float numbers like 3.2 and 1.6 .

I need to separate the number into the integer and decimal part. For example, a value of 3.2 would be split into two numbers, ie 3 and 0.2

Getting the integer portion is easy:

n = Math.floor(n);

But I am having trouble getting the decimal portion. I have tried this:

remainer = n % 2; //obtem a parte decimal do rating

But it does not always work correctly.

The previous code has the following output:

n = 3.1 => remainer = 1.1

What I am missing here?

使用1而不是2 。

js> 2.3 % 1
0.2999999999999998

var decimal = n - Math.floor(n)

虽然这不适用于负数，所以我们可能不得不这样做

n = Math.abs(n); // Change to positive
var decimal = n - Math.floor(n)

你可以转换为字符串，对不对？

n = (n + "").split(".");

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