#16 JavaScript Variable Scope | JavaScript for Beginners

Scope refers to the availability of variables and functions in certain parts of the code. In JavaScript, a variable has two types of scope: Global Scope and Local Scope

In computer programming, variable scope defines the availability of a variable in different regions of a program. Watch the full video to have a clear understanding of the working of JavaScript variables scope.

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Timestamps:
00:14 Scope
03:15 Global Scope
04:19 Change the value of Global Variable
06:24 Block Scoped
08:18 Quiz

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#16 JavaScript Variable Scope | JavaScript for Beginners

#programiz #javascript #JStutorial #global #local #scope #variablescope #learnprogramming

[programizstudios]

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[tikuretentrance]

I have seen all of your videos in js, and i would like to say thank you for sharing this type of incredible knowledge!!!❤❤❤❤

[jacksebbenunicyclist]

I believe the answer for the end question would be answer #3, 20.
- globally 'a' = 88
- then our function redefines 'a' to = 77
- then our function takes the newly defined value of 'a' and subtracts 57 to get a new value of 'a' as 20
- Outside of the function in the "global zone" we call upon/invoke our function that then globally defines 'a' as 20

Great tutorials again, so easily explained. Love this series and your channel <3

[halee]

answer 88
bcz 1st let a =88
second let in function that is block scope

1st function call noting happend ..
then console.log (a) call that mean the cansole.log(a) refer to 1st let a =88 bcz sencod let in fuction that is block scope

[IstvanWeisz_logoby]

at the block scope when you tried to print with the console result1 gave a ReferenceError which is pretty understandable because you wrote console.log(result1); but there is a way to console log the result1 outside of the block, like console.log(result.result1) or something? The answer to your question at the end is 3. 20?

[mohammedgawish]

88.

because when you declare variable inside function it becomes blocked. but if you didn't wrote let it will be globel

[AdeoluwaIdowu]

a is 20. the function name has been called already, hence a will be 77 - 57.

[Project-Salone-Man]

Hey Punit, going through the Javascript tutorial but whenever I am try to run a code to get user input using parseInt, or parseFloat (prompt("")) for example, I always get an error. No matter where I try to so it. Your online compiler, vscode, like anywhere

Below is the Error. Can you please help. Thank you

node /tmp/birPAQMq81.js

throw err;
^

Error: Cannot find module 'readline-sync'
at
at Function.Module._load
at Module.require
at require
at Object.<anonymous> (/tmp/birPAQMq81.js:8:26)
at Module._compile
at Object.Module._extensions..js
at Module.load
at tryModuleLoad
at Function.Module._load