Traditional functions and arrow functions

arrow-functions.js

// Traditional functions
function mySum(x, y){
    return x + y;
}
function myHello(){
    return "Hello.";
}
function myMagicFunction(){
    let x = 10;
    return x + 5;
}

// Arrow Function With Parameters:
let sum = (x, y) => x + y;

// Arrow Function Without Parameters:
let hello = () => "Hello.";

// Arrow Function With Body;
let magicFunction = () => {
    // do something
    let x = 10;
    return x + 5
};


console.log("Traditional functions:");
console.log(mySum(2,5));
console.log(myHello());
console.log(myMagicFunction());
console.log("Arrow functions:");
console.log(sum(2,5));
console.log(hello());
console.log(magicFunction());

class Person{
    constructor(name, age) {
	this.name = name;
	this.age = age;

	// define methods with arrow functions
	this.getName = () => {
	    return this.name;
	}
	this.getAge = () => {
	     return this.age;
	}
    }
    // define methods with traditional functions
    sayName(){
	    return this.name;
    }
    sayAge(){
	return this.age;
    }
}
// create an object
let juan =  new Person("Juan Reynoso", 36);

console.log("Traditional functions:");
console.log(juan.sayName());
console.log(juan.sayAge());
console.log("Arrow functions:");
console.log(juan.getName());
console.log(juan.getAge());