Question

Java program

5. Write a short Java program to compute factorial of a given integer from input using recursive function.

Answer 1

Here is the code for you:

//Program to calculate the factorial of a given number.
import java.io.*;
import java.util.*;
class FactorialRecursive
{
    public static void main(String[] args)
    {
       //Reads a value from the console.
       System.out.print("Enter the value: ");
       Scanner sc = new Scanner(System.in);
       int value = sc.nextInt();
       //Calculates the factorial, and prints the result to the screen.
       System.out.println("The factorial of " + value + " is: " + factorial(value));
    }
    //Function to calculate the factorial of a number.
    public static long factorial(int n)
    {
       if(n <= 0)
           return 1;
       return n * factorial(n-1);  
    }
}​

And the output screenshot is: