javascript friendly number format with commas code example

Example 1: number with commas js

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

Example 2: javascript friendly number format with commas

//ES6 Way
const numberWithCommas = (x) => {
  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}

Example 3: how to format an integer with a comma in javascript

x.toString().toLocaleString(); // x must be a number

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