Functions

// Arrow Function 1 (Single Parameter, Implicit Return)
const square = x => x * x;
 
// Arrow Function 2 (Multiple Parameters, Implicit Return)
const add = (a, b) => a + b;
 
// Arrow Function 3 (Multiple Parameters, Explicit Return)
const multiply = (a, b) => {
  return a * b;
};
 
// Arrow Function 4 (No Parameters, Implicit Return)
const greet = () => "Hello, world!";

// Function Declaration
function add(a, b) { // uses `function` keyword and has a name
  return a + b;
}
 
// Function Expression 1 (Anonymous Function)
const add = function(a, b) { // uses `function` keyword but is anonymous
  return a + b;
};
 
// Function Expression 2 (Arrow Function)
const add = (a, b) => { // uses arrow syntax
  return a + b;
};