36.99300003051758 I'm receiving this kind of value how can round of this

Can I suggest you edit the title of your post to something like... How to round a JavaScript number to 2 decimal places. As 'Function node opto 22' would mean nothing to people searching the forum.

Try this in a 'function' node. msg.payload = Math.round((msg.payload) * 100) / 100; Gives 36.99 from your posted value. [round] Here's a link to some examples. [image] Round a Number to 2 Decimal Places in JavaScript This tutorial teaches how to round a number to at most `2` decimal …

[image] dynamicdave: Math.round((msg.payload) * 100) / 100; It seems like Math.round() is a better solution, but it is not! In some cases it will NOT round correctly. Also, toFixed() will NOT round correctly in some cases. To correct the rounding problem with the previous Math.round() and to…

Can you give an example of where they give a false value? var num = 9.7654; msg.payload = num.toFixed(2) return msg; returns 9.77 as expected.

Indeed, I'd be interested too: let n = 1.044444444444444444444444444444444444444444444444444444444445 Number.prototype.roundTo = function (decimal) { return +(Math.round(this + "e+" + decimal) + "e-" + decimal); } return {payload: [n.toFixed(2), Math.round(n * 100) / 100, n.roundTo(2)] }…

When they fail (without touching the exponential) let addFailures = 0, multFailures = 0 let n = 1000000000000.1; let a,b for (let index = 0; index < 10000; index++) { n += 1000000000.01 a = parseFloat(n.toFixed(2)) b = Math.round(n * 100) / 100 if(a !== b){ addFailures …

Arguably that is not due to those functions failing, it is due to the basic arithmetic failing when working at the limit of the number of bits available for the calculations. Consider this for example (taking one of the failures found) msg.payload = 10292000000091.135 msg.payload = msg.payload + 0…

Ah yes, I'd forgotten about that. In general and for most cases not really an issue. If you really need precision I'd normally use something like royNiladri/js-big-decimal: Work with large numbers on the client side with high precision. (github.com) - or indeed avoid JS all together and use Python,…

[image] Colin: Can you give an example of where they give a false value? // where Math.round() fails var num = 1511000000005.2148; // this should round to 1511000000005.21 console.log(num.toFixed(2)); // outputs 1511000000005.21 ✅ console.log(num.roundTo(2)); // outputs 1511000000005.21 ✅ con…

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How do I round a JavaScript number to 2 decimal places?

General

eksij 13 August 2022 05:07 14

In JSONata
$formatNumber(12.225, '0.00')
Can get '12.23'

$number($formatNumber(12.225, '0.00'))
Can get 12.23

In Function
var num = 12.225;
num.toFixed(2);
Can get '12.22'

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How do I round a JavaScript number to 2 decimal places?

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