praveen-me

var a = 'global';               //I am a global scope
function iAmLocal() {           //I am a global scope
  console.log(a) // 'global'  
}                               //I am a global scope

praveen-me

var a = 'global'; 

function iAmLocal() {
  a = 'is I am local';
}

iAmLocal();

a;   //Think and let's give it a moment ??

praveen-me

var a = 'global';

function iAMLocal() {
  var b = 'local';
}

a; //'global'
b; //??

praveen-me

function sum() {
  var a = 5;
  var result = 0;

  // Declaring second function
  function secondNumber() {
    var b = 10;
    return a+b;
  }

praveen-me

var num1 = 5; //globally

function add() {
  var num2 = 8;  //locally

  return function() {      //returning function
    return num1 + num2;    //returning function 
  }                        //returning function
}

praveen-me

for(var i = 1; i <= 10; i++) {
  console.log(i);
}

i;  //Can I access it out side??.

praveen-me

for(let i = 1; i <= 10; i++) {
  console.log(i);
}

i; //Can I access i now??

praveen-me

{
  "name": "Chrome Extension Blog",
  "description" : "This chrome extension has code for chrome extension blog",
  "version": "1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "New Tab",
    "default_icon": "/img/logo.png"
  },

praveen-me

/* Time Block CSS */
.time_block {
  text-align: center;
  font-size: 5rem;
}

.time_block h1 {
  margin: 1rem 0;
}

praveen-me

const hourElm = document.getElementById('hour');
const minutesElm = document.getElementById('minutes');

// function to set time
function setTime() {
  let now = new Date();

  hourElm.innerHTML = now.getHours();
  minutesElm.innerHTML = now.getMinutes();
}