Using below code to convert a number into comma seprated, but its adding currency symbol at the front, how can I stop it from adding it.

var myFormat = format.getCurrencyFormatter({currency: "USD"});
var newCur = myFormat.format({number: parseFloat(myNumber)});

For example: 3938.76 is converting to $3,938.76 While I only want it to look like this 3,938.76

I suspect the problem is that you are using the CurrencyFormatter instead of the NumberFormatter. Perhaps try using

format.getNumberFormatter()

instead: https://suiteanswers.custhelp.com/app/answers/detail/a_id/87238