Round Javascript Float number to 2 decimal digits

Question

In my project, when I am subtracting 96.74 from 60, javascript is giving me 36.739999999999995 , but I need 36.74 to do further calculation.

What should I do, how do I overcome this problem??

Thanks in advance.

What code did you try? It's hard to give an answer when you don't know what hasn't worked. Are you having an error with Math.round()? :) — JSman225, May 12 '21 at 14:45
Am I the only one that expects -36.74 when I subtract 96.74 from 60? — Chris Wesseling, May 12 '21 at 14:56

score 1 · Answer 1 · answered May 12 '21 at 14:46

1

Example how to round to two decimals, if that was what you wanted?

 var x = 36.739999999999995;

 x = Math.round(x*Math.pow(10,2))/Math.pow(10,2);

 console.log(x);

answered May 12 '21 at 14:46

Filip Huhta

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thanks, it worked for this case, but I am performing this operation on a array and not all numbers have 2 precision after decimal. I will test with different data sets and let you know – ratnesh May 12 '21 at 14:54

Spectric · Accepted Answer · 2021-05-12T14:56:30.917

1

Use parseFloat and set the decimal places to 2 with .toFixed(2)

console.log(parseFloat(36.739999999999995).toFixed(2))

If you want to get rid of trailing zeroes cast the result to a Number:

var num = Number(parseFloat(36.7).toFixed(2));
console.log(num);

edited May 12 '21 at 14:56

answered May 12 '21 at 14:48

Spectric

30,714
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thanks, it worked for this case, but I am performing this operation on a array and not all numbers have 2 precision after decimal. I will test with different data sets and let you know – ratnesh May 12 '21 at 14:53

Round Javascript Float number to 2 decimal digits

2 Answers2