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Arrow Functions

Arrow functions allow you to write functions more concisely.

Arrow functions are created using the arrow (=>) symbol instead of the function keyword.


Basic Structure of Arrow Functions
const functionName = (parameter1, parameter2) => {
  // function body
};

Example of an Arrow Function
const add = (a, b) => a + b;

console.log(add(1, 2)); // Outputs 3

Using arrow functions can make your code simpler compared to traditional function expressions.

Comparison of Traditional and Arrow Functions
// Traditional function
const sayHello = function (name) {
  return 'Hello, ' + name + '!';
};

// Arrow function
const sayHello = (name) => 'Hello, ' + name + '!';

Examples of Arrow Functions​

Here are some examples of how you can use arrow functions.


When There Are No Parameters​

You can use empty parentheses to indicate no parameters.

Arrow Function with No Parameters
const greet = () => 'Hello!';

When There Is One Parameter​

Parentheses can be omitted when there is a single parameter.

Arrow Function with One Parameter
const double = x => x * 2;

When There Are Two or More Parameters​

List parameters separated by commas.

Arrow Function with 2 or More Parameters
const add = (a, b) => a + b;

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