How to round off value to 2 digit precision. Eg 55.0000 to 55.00

[joel19913]

How to round off value to 2 digit precision. Eg 55.0000 to 55.00

[larsga]

Your example is not rounding, because the two numbers are equal. Are you asking how to display it in a string with two decimals after the period?

[joel19913]

Yes I need only two digits after period

[larsga]

Do you understand the question?

[joel19913]

Yes I understand. I don't want to round off the value. I have a value like 40.0000 I wanted to trim it upto 2 digits after period. I. e 40.00

[larsga]

This question is a bit frustrating, because I've had it before, but I've never been able to fully figure out what it is people are asking for.

Sometimes they may actually want rounding, like here. Or maybe not. It's hard to tell.

This guy, I think, wanted the number formatted inside a string in a particular way.

Although you don't say so, I suspect it's the formatting inside a string that you want, too. Am I right?

[joel19913]

Yes I referred above two examples. but I don't get the solution.I don't want the round off, instead I wanted to format value upto 2 digits after the period.

[joel19913]

Is there a solution for this issue? All i want is to format the value to have two digits after the decimal.

[catull]

It depends what you want to achieve.

If it is being processed elsewhere, then "55.0", "55.00" and "55" are all the same value.

But do you display it on an UI ?

Now, knowing almost nothing about your requirements, here is an attempt.

Take this input:

{
  "values": [
    55,
    55.0,
    55.00,
    39.585,
    13.995,
    53.7745
  ]
}

with this transformation:

def formatNumberTotwoDecimals (num)
  let fix      = floor ($num)
  let partial  = floor (100 * ($num - $fix))
  let dezi     = floor ($partial / 10)
  let centi    = mod ($partial, 10)
  let afterDot = join ([$dezi, $centi], "")
  join ([$fix, $afterDot], ".")

{
  "values": [
    for (.values)
      formatNumberTotwoDecimals (.)
  ]
}

you obtain:

{
  "values" : [ "55.00", "55.00", "55.00", "39.58", "13.99", "53.77" ]
}

Is this what you want ?

[joel19913]

Great! Yes this what I want. Thank you.

[catull]

Hang on, I made a mistake.

Here is a more precise version of the transformation.

def formatNumberToTwoDecimals (num)
  let fix      = floor ($num)
  let partial  = floor (100 * ($num - $fix))
  let dezi     = floor ($partial / 10)
  let centi    = mod ($partial, 10)
  let afterDot = join ([$dezi, $centi], "")
  join ([$fix, $afterDot], ".")

{
  "values": [
    for (.values)
      formatNumberToTwoDecimals (. + 0.005)
  ]
}

With input:

{
  "values": [
    55,
    39.585,
    13.995,
    53.7745
  ]
}

the result would be:

{
  "values" : [ "55.00", "39.59", "14.00", "53.77" ]
}

Hope this helps.

[joel19913]

Thank you