Currency format in google apps script - google-apps-script

Question

I have created some set of rows for a requirement gathering document in which for a range I have set numberformat for USD as
ex_range.setNumberFormat("[$$]#");
upon execution, in the range when the user enters the value, the formatting rounds it to a whole number.
I tried
ex_range.setNumberFormat("[$$]#,##0.0000");
and for the above, when the user enters a value say e.g. 34.56 I get $34.5600
I want the user to enter the value and whatever decimal points they enter to not round off or add extra zeros.
If the user enters 50.67, I should get $50.67 and if 45.5670 is entered I should get $45.5670
Please help in how to set the format to USD for the range and no round up happens to the values.
I am having the user fill value in the range K43:P57, they should be able to enter any value with any decimal number, the value should not get rounded off.
and the script should read the range K43:P57and identify the value with highest decimal numbers and populate in G43

Answer 1

With an onEdit(e) function you can set the number format for the edited cell. This will override the column formatting. Be aware that the 0 at the end of 5.989830 will be "cut off" before sending it to the script. So the value of n inside the script below will be 5.98983 like #Tanaike is mentioning in the comments. Nevertheless i hope this will help:
EDIT: If the original column formatting is Plain text the solution below will work with tailing zero's
Extensions -> Apps script.
Paste the code.
Change the sheetname and column number to the values where theformatting needs to happen.
Save an quit.
Test it out.
function onEdit(e) {
//Settings
const sheetname = "BB";
//Rest of script
const sheet = e.source.getActiveSheet();
const range = e.range;
const n = e.value;
if (isNaN(n)) return;
if (sheet.getName() !== sheetname) return;
const column = range.getColumn();
if (column < 11) return;
if (column > 16) return;
const row = range.getRow();
if (row < 43) return;
if (row > 57) return;
const length = n.toString().split(".")[1].length;
const zeros = new Array(length).fill("0").join("");
const format = "#,##0." + zeros;
range.setNumberFormat(format);
}