Learn JavaScript VARIABLE SCOPE in 5 minutes! 🏠

[@BroCodez]

// variable scope = where a variable is recognized // and accessible (local vs global) let x = 3; // global scope function1(); function function1(){ let x = 1; // local scope console.log(x); } function function2(){ let x = 2; // local scope console.log(x); }

[@billionairem4fia]

3:27 is a global scope

[@LizyAd]

This has to be the best explanation for scoping on youtube. I love the examples!

[@goodness776]

Best incremental teaching! You are a gifted teacher.

[@emagenation6409]

This is the best and clearest explanation I can get on youtube!! Your reference of neighbour house makes so much sense to me. Thank you, you’re the best teacher bro🙏

[@GrayShark09]

Yes! Bro Code is a master explainer! I am sure he knows about Feynnman's technique.

[@fu1rkan]

I love the way how you explane that!

[@piotrmazgaj]

This is my seal. I have watched the entire video, understood it, and I can explain it in my own words, thus I have gained knowledge. This is my seal.

[@buddhavlr1500]

Thank you for your tutorials man!

[@learnwithraj23]

One of the best explanation thanks Bro

[@DutchSapper]

Thanks !! good explanation

[@rajesh_nambi]

Very Good Explanation.

[@WisdomInExperience]

what about variables declared in other files in global scope ? are they acceible outside that file in global scope ? what is diff between let and var ?

[@Just_Jen1509]

The stalker analogy 😂😂😂😂

[@ftzah1542]

Well done man thanks ❤

[@AhmedAlbably]

really awesome you are the best ever

[@638_umarsheik8]

Great man

[@Jvst-bg9wg]

Thank you 🎉

[@saraelkady5033]

amazing

[@tamekkaknuth9612]

Exactly 20000% confident

[@cirog.9341]

thank you Bro!

[@hunin27]

Hi Bro, couldn't you declare (even if it's bad practice) a local variable to be global inside of a function? For example in python you do: global x = 5. even if it is declared inside of a function it is now global and accessible everywhere. Much love ❤

[@sarcasmclub]

i know it's been 8 months since you asked but i was just playing with the scope and variable and noticed that if you do not use let ,var ,const to declare a variable inside a function it creates a global variable which can be accessed from anywhere Example: function myFunc() { num = 3; // didn't use var let const before the variable name // also works with function sayhi = function () { console.log("sayHi"); }; } myFunc(); // You have to first call this function // not calling will result in not defined console.log(num); // it prints the value i.e, 3 even though num is inside function myFunc sayhi(); // you can call this function without error // Not using "let" "const" "var" when declaring variable inside function creates global variables

[@the_n_ecromancer]

I thought you would explain var keyword

[@litium54]

creepy guy ahahaha maybe he is just waiting for the bus (?)

[@DamianDemasi]

Variables defined with `let` aer scoped to blocks and functions, and can be reassigned Variables defined with `const` are scoped to blocks and functions, and cannot be reassigned Variables defined with `var` are scoped to functions or global (if define in block), and it can be reassigned ``` // Block { var aVar = 1; console.log('aVar', aVar); let aLet = 2; console.log('aLet', aLet); const aConst = 3; console.log('aConst', aConst); } console.log('aVar', aVar); // console.log('aLet', aLet); // Fails // console.log('aConst', aConst); // Fails // Function function myFunc() { var aFuncVar = 10; console.log(aFuncVar); } myFunc(); // console.log(aFuncVar); // Fails ```