let greet = x => console.log(x);

greet('Hello'); // Hello

// Non Arrow (standard way)

let add = function(x,y) {

  return x + y;

}

console.log(add(10,20)); // 30

​

// Arrow style

let add = (x,y) => x + y;

console.log(add(10,20)); // 30;

​

// You can still encapsulate

let add = (x, y) => { return x + y; };

// JavaScript ES5 function

function getGreeting() {

  return 'Welcome to JavaScript';

}

​

// JavaScript ES6 arrow function with body

const getGreeting = () => {

  return 'Welcome to JavaScript';

}

​

// JavaScript ES6 arrow function without body and implicit return

const getGreeting = () =>

  'Welcome to JavaScript';

const welcome = () => {

    console.log("THIS IS A ARROW FUNCTION")

}

// Traditional Function Expression

var add = function(a,b){

  return a + b;

}

​

// Arrow Function Expression

var arrowAdd = (a,b) => a + b;

​

const sayHi = ()=>console.log('Hi');

​

const power = (base, exponent) => {

    let result = 1;

    for (let count = 0; count < exponent; count++) {

      result *= base;

    }

    return result;

  };

const greeting = () => console.log('Hello World'); 

const myFunction = () => {

  console.log("Hello, world!");

}

let myFunction = (arg1, arg2, ...argN) => {

    statement(s)

}