Same name parameters in JavaScript

Now let the outer and inner functions have the same name parameters:

function test(num) {
	function func(num) {
		console.log(num); // shows 1
	}
	
	func(num);
};

test(1);

In this case, the inner function will have the local variable num. Its change in the inner function will not affect the outer variable num:

function test(num) {
	function func(num) {
		num = 2; // changes the local variable num
	}
	
	func(num);
	console.log(num); // shows 1 - nothing has changed
}

test(1);

It turns out that the inner function will not be able to access the outer variable num in order to change it:

function test(num) {
	function func(num) {
		// here you can not access to the external variable num
	}
	
	func(num);
}
test(1);

Determine what will be output to the console without running the code:

function test(num) {
	function func(num) {
		console.log(num);
	}
	
	func(num);
}

test(1);

Determine what will be output to the console without running the code:

function test(num) {
	function func(num) {
		num = 2;
	}
	
	func(num);
	console.log(num);
}

test(1);

Determine what will be output to the console without running the code:

function test(num) {
	function func(num) {
		console.log(num);
	}
	
	num = 2;
	func(num);
}

test(1);

Determine what will be output to the console without running the code:

function test(num) {
	function func(num) {
		console.log(num);
	}
	
	func(num);
	num = 2;
}

test(1);