ilearnjavascript/es6 - new variable declarations - let and const - 4.js Secret

## es6 - new variable declarations - let and const - 4.js
let firstname = 'John';
console.log(firstname); // ouputs: John
let firstname = 'Jane'; // Error: Uncaught SyntaxError: Identifier 'firstname' has already been declared
firstname = 'Jane';
console.log(firstname); // ouputs: Jane
	let firstname = 'John';
	console.log(firstname); // ouputs: John
	let firstname = 'Jane'; // Error: Uncaught SyntaxError: Identifier 'firstname' has already been declared
	firstname = 'Jane';
	console.log(firstname); // ouputs: Jane