JavaScript: Create a specified currency formatting from a given number

JavaScript fundamental (ES6 Syntax): Exercise-126 with Solution

Write a JavaScript program to create a specified currency formatting from a given number.

  • Use Intl.NumberFormat to enable country / currency sensitive formatting.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const toCurrency = (n, curr, LanguageFormat = undefined) =>
  Intl.NumberFormat(LanguageFormat, { style: 'currency', currency: curr }).format(n);

console.log(toCurrency(123456.789, 'EUR')); // currency: Euro | currencyLangFormat: Local
console.log(toCurrency(123456.789, 'USD', 'en-us')); // currency: US Dollar | currencyLangFormat: English (United States)
console.log(toCurrency(123456.789, 'USD', 'fa')); //currency: US Dollar | currencyLangFormat: Farsi
console.log(toCurrency(322342436423.2435, 'JPY')); //currency: Japanese Yen | currencyLangFormat: Local
console.log(toCurrency(322342436423.2435, 'JPY', 'fi')); //currency: Japanese Yen | currencyLangFormat: Finnish

Sample Output:

322 342 436 423 ¥


flowchart: Create a specified currency formatting from a given number

Live Demo:

See the Pen javascript-basic-exercise-126-1 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript program to convert a float-point arithmetic to the Decimal mark form and It will make a comma separated string from a number.
Next: Write a JavaScript program to iterate over a callback n times.

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JavaScript: Tips of the Day

How to remove a specific item from an array?

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];


const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);

// array = [2, 9]

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  return arr;

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
  return arr;
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

Ref: https://bit.ly/2N9nKRp