재귀적 팩토리얼

- Java

public static int factorial(int s) {
    if(s==1) 
        return 1;
    else
        return (s * factorial(s-1));
}

public static void main(String[] args) {
    System.out.println(factorial(4));
}

 

- Swift

func factorial(item: Int) -> Int {
    if item == 1 {
        return 1
    }else {
        return item * factorial(item: item-1)
    }
}

print(factorial(item: 4))