how to put a divider char between a number string in javascript for example I have 123456 and I want to be 123,456 or 1000000 to 1,000,000

Question

I want to put a price on something and I get a string number and it should be divided by every 3 letters but what eve I try to do I can't is there any function or way that could be helpful ?

Answer 1

The simplest way is using Number#toLocaleString with a locale. The locale en-US uses commas to delimit every third digit and a dot to delimit the decimal fractional part.

const n = 1000000
const fractional = 12345.67

console.log(n.toLocaleString('en-US')) // 1,000,000
console.log(fractional.toLocaleString('en-US')) // 12,345.67

Answer 2

Use this function:

    function numWithCommas(x) {
        return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    }


    console.log(numWithCommas(100000));