Learn JavaScript VARIABLE SCOPE in 5 minutes! 🏠

// 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);
}

[@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!

[@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.

[@buddhavlr1500]

Thank you for your tutorials man!

[@ftzah1542]

Well done man thanks ❤

[@638_umarsheik8]

Great man

[@Jvst-bg9wg]

Thank you 🎉

[@hmed-Albably]

really awesome you are the best ever

[@cirog.9341]

thank you Bro!

[@tamekkaknuth9612]

Exactly 20000% confident

[@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 ❤

[@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 ```