Function Declaration (vs) Function Expression

Function Declaration:	Function Expression:
A function created with function keyword and a function name. Function Declarations are "Hoisted".	A function created annonymously, without name Function Expression are "Not-hoisted". It can be assigned to a variable and we can call the function using that variable. (or) It can be used as a callback function (or) It can be used as a IIFE function

let param1 = "Name";
let param2 = "Name2";


// FUNCTION DECLARATION -Start ######################
dd(param1)

function dd(p1) {
    console.log('This is normal function declaration', param1);
    return p1
}
// FUNCTION DECLARATION -End ######################


// FUNCTION EXPRESSION -Start #####################
//Normal function expression
let ee = function (p1) {
    console.log('This is normal function expression', param1);
    return p1
}
ee(param1)

// Arrow Function Expression
let ee2 = (p1) => {
    console.log('This is normal function expression', param1);
    return p1
}
ee2(param1)

// IIFE (Immediately Invoked Function Expression)
(function () {

    console.log('This is normal function expression', param1);
    //...
})()

// FUNCTION EXPRESSION -End ######################