var vs let js
let: //only available inside the scope it's declared, like in "for" loop,
var: //accessed outside the loop "for"var vs let js
let: //only available inside the scope it's declared, like in "for" loop,
var: //accessed outside the loop "for"Difference between let and var in javascript
let a = 'hello'; // globally scoped
var b = 'world'; // globally scoped
console.log(window.a); // undefined
console.log(window.b); // 'world'
var a = 'hello';
var a = 'world'; // No problem, 'hello' is replaced.
let b = 'hello';
let b = 'world'; // SyntaxError: Identifier 'b' has already been declaredwhat to use let vs var js
/* DIFFERENCE BETWEEN LET AND VAR */
//LET EXAMPLE
{
let a = 123;
};
console.log(a); // undefined
//VAR EXAMPLE
{
var a = 123;
};
console.log(a); // 123Copyright © 2021 Codeinu
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