Javascript display the last 3 numbers after the dot fixed(3) not working-CodePudding

I have a number which looks number this:

800.60000305176541

This number changes all the time.

So I'm doing this:

var mynumber = 800.60000305176541

var changenumber = mynumber.toFixed(3);

This is displaying 800.600 ... I need it to display the last 3 like:

800.541

How can I do this?

CodePudding user response：

You can convert to string and do your manipulations. Please note we are loosing the right most digit due to limits of javascript.

var num = 800.60000305176541;

var str = ""   num
var arr = str.split(".");
var result = arr[0]
if (arr[1]) {
  result  = "."   arr[1].slice(-3)
}
console.log(num)
console.log(result)

CodePudding user response：

You could also try to solve it mathematically.

800.60000305176541 
800.60000305176000 - 
------------------
800.00000000000541



.00000000000541
    10^10.         X
------------------ 
   0,541   800 = 800.541