Slip 22 - A) Write a Java program to calculate factorial of a number using recursion.

Solution :

import java.util.Scanner;

public class Slip22A {

    public static void main(String[] args) {

        Scanner scan=new Scanner(System.in);

        System.out.println("Enter any number: ");

        int num = scan.nextInt();

        long factorial = multiplyNumbers(num);

        System.out.println("Factorial of " + num + " : " + factorial);

    }

    public static long multiplyNumbers(int num)

    {

        if (num >= 1)

            return num * multiplyNumbers(num - 1);

        else

            return 1;

    } 

}

Output: