All Articles
Four Different Ways to Write Functions in Javascript
April 13, 2018

Functions are the basic building blocks of the Javascript. A function in Javascript is a code block that performs a specific task or set of tasks.

There are basically 4 (four) different ways we can define functions in Javascript.

  • Function Declaration
  • Function Expression
  • Arrow Function Expression
  • Concise Arrow Function Expression
// Function Declaration
function square(x) {
    return x * x;

// Function Expression
const square = function(x) {
    return x * x;

// Arrow Function Expression
const square = x => {
    return x * x;

// Concise Arrow Function Expression
const square = x => x * x;

If you prefer you can take a look at the video tutorial,