Number of function parameters in TypeScript

In TypeScript, when a function is called, exactly as many values must be passed to it as there are parameters defined in it.

Let's look at an example. Let's say we have a function that takes the user's first and last name as a parameter and returns them as a string:

function func(first: string, last: string) {
	return first + ' ' + last;
}

Let's call our function with a different number of parameters:

func('john');               // error, not enough parameters func('john', 'smit', 'xx'); // error, too many parameters func('john', 'smit');       // works

The following function is given:

function func(a: number, b: number) {
	return a + b;
}

Tell what the result of each of the following function calls will be:

func(1);
func(1, 2, 3);
func(1, 2);