Four(4) Different Ways to Write Functions in Javascript

Baljeet Singh

1 minute read

**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,

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