Javascript function claration

function-declaration.js

// Function Declarations
function sum(a, b) {
  return a + b
}

// Function Expressions
const sum = function(a, b) {
  return a + b;
}

// Function Expressions
const sum = (a, b) => {
  return a + b;
}

// Function Expressions
const sum = (a, b) => a + b;

// Function Constructors
const sum = new Function('return arguments[0] + arguments[1]')