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// Global scope variable available throughout the application.

// Try doing console.log(globalVar) in callbacks.js or closures.js

const globalVar = 100;

{

'use strict';

// Exercise #1

// const firstLocalFunction = () => {

// const localVar = "I am a local variable";

// console.log('INSIDE FIRST LOCAL FUNCTION', localVar, globalVar);

// };

// firstLocalFunction();

// Exercise #2

// const secondLocalFunction = () => {

// // can use the same variable name here because of local scoping

// const localVar = 10;

// const nestedFunction = () => {

// const nestedVar = "I am a nested variable";

// console.log('INSIDE NESTED FUNCTION', nestedVar, localVar, globalVar);

// };

// // nestedVar is not visible here

// nestedFunction();

// };

// secondLocalFunction();

// localVar defined inside the functions isn't visible here

// Exercise #3

// const myFunction = () => {

// const localVar = 10;

// if (localVar === 10) {

// const innerVar = 100;

// console.log('INSIDE IF BLOCK', localVar, innerVar);

// }

// console.log(innerVar);

// };

// myFunction();

// Exercise #4

// const trickFunction = () => {

// const arr = [10, 12, 15, 21];

// for (var i = 0; i < arr.length; i++) {

// setTimeout(function() {

// console.log('Index: ' + i + ', element: ' + arr[i]);

// }, 3000);

// }

// };

// trickFunction();

};