// Excluding not applicable arguments
 
const fact1 = function (n) {
	function f(n) {
		if (n == 0) return 1;
		return n * f(n - 1);
	}
	if (n < 0) return -1;  // not applicable
	return f(n);
};
 
console.log("Factorial:");
for (let i = -3; i <= 16; i++) {
	console.log(`${i}!=${fact1(i)}`);
}
 
const fib1 = function (n) {
	function f(n) {
		if (n <= 1) return n;
		return f(n - 1) + f(n - 2);
	}
	if (n < 0) return -1;  // not applicable
	return f(n);
};
 
console.log("Fibonacci sequence:");
for (let i = -3; i <= 20; i++) {
	console.log(`f(${i})=${fib1(i)}`);
}

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