Math.round() for exact price - rounding to exact hundreth

JavaScript
1

Hi! I’m trying to figure out how I can get a Math.round() result to output a hundredth decimal if that decimal rounds to a tenth (hard to explain, sorry).
Basically, if you’re calculating the percentage of a cash price, and the rounded product is, say, “$14.90”, the Math.round() will output “14.9” instead of “14.90”. It drops the 0 since it is unnecessary, but this isn’t aesthetically pleasing for, say, an e-commerce page. How could I get the output to generate 2 numbers after the decimal, even if the result is an even tenth of a decimal?
I’ve tried looking up solutions but I clearly don’t know how to articulate my question so I’m drawing blanks :sweat_smile:

2

If you are dealing with numbers, you are not going to see trailing zeros. If, however, you are converting your numbers to strings (for display) then you can use toFixed()

You can also use toLocaleString() to format currency.

3

say your opinion about this code
I am learning JavaScript. just try to implement same without using default method

function selectHomanyDigitYouNeedAfetrDot(num, n) {

  num = num + ''

  num = num.split('');

  var indexOfDot = num.indexOf('.')

  var copyNumberAFterDot = num.slice(indexOfDot, indexOfDot + n + 1)

  var copyNumberBeforerDot = num.slice(0, indexOfDot)

  var requiredValue = copyNumberBeforerDot + copyNumberAFterDot;

  requiredValue = requiredValue.replace(/[,]/g, '')

  requiredValue = Number(requiredValue)

  return requiredValue;

}

var a = selectHomanyDigitYouNeedAfetrDot(12345.2567, 3)

console.log(a)
4

@Eldhose I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make easier to read.

See this post to find the backtick on your keyboard. The “preformatted text” tool in the editor (</>) will also add backticks around text.

Note: Backticks are not single quotes.

markdown_Forums

Your function would not produce the correct output for the following:

selectHomanyDigitYouNeedAfetrDot(12345.25067, 3);

It would display 12345.25 instead of 12345.250

Also, unlike toFixed, your function would not round if necessary. If rounding is considered, then the above would need to display 12345.251.

5