RecapOfLet.js

function foo(){
	var bar = "bar";
	for(let i = 0;i<bar.length;i++){
		console.log(bar.charAt(i));
	}
	console.log(i) // Referece error
}

foo();


function foo(bar){
	if(bar){
		let baz = bar;
		if(baz)
		{
			let bam = baz;
		}
		console.log(bam); // error

	}
	console.log(baz); //error
}

foo("bar");