Are variables declared with let or const hoisted?

Question

I have been playing with ES6 for a while and I noticed that while variables declared with var are hoisted as expected...

console.log(typeof name         


        

Answer 1

in es6 when we use let or const we have to declare the variable before using them. eg. 1 -

// this will work
u = 10;
var u;

// this will give an error 
k = 10;
let k;  // ReferenceError: Cannot access 'k' before initialization.

eg. 2-

// this code works as variable j is declared before it is used.
function doSmth() {
j = 9;
}
let j;
doSmth();
console.log(j); // 9