Answers for "what to use let vs var js"

19

var vs let js

let: //only available inside the scope it's declared, like in "for" loop, 
var: //accessed outside the loop "for"
Posted by: Guest on May-22-2020
3

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 declared
Posted by: Guest on May-22-2021
0

what 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); // 123
Posted by: Guest on June-15-2021

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