How to Explore Differences Between the var and let Keywords

[nguyenquanganh]

Explore Differences Between the var and let Keywords
Here’s my source code:

let catName;
let quote;
function catTalk() {
"use strict";

catName = "Oliver";
quote = catName + " says Meow!";
}
catTalk();

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36

Challenge: Explore Differences Between the var and let Keywords

Link to the challenge:

freeCodeCamp.org

Why I copy source code but error in catSound? (catSound should be the string Meow!)

This is the first time I write to get help in freecodecamp forum. Thank you very much!

[lasjorg]

You seem to have some old code. All that you should see in the starting code is this.

var catName = "Oliver";
var catSound = "Meow!";

And all you have to do is change the var to let

[nguyenquanganh]

Thank you very much!
Here is my source code after I fixed:

let catName = "Oliver";
let catSound = "Meow!";
let quote;
function catTalk() {
  // "use strict"

  quote = catName + " say Meow";
}
catTalk();