Java program to find the factorial of a number using recursion

In this article we will learn to implement a Java program to find the factorial of a number using recursion. A Java program is provided below to read a number and print the factorial of that number.

Following program reads a number form the user and prints its factorial using recursion:

import java.util.Scanner;

public class Driver
{	
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.println("Enter a number: ");
		int n = input.nextInt();
		System.out.println("Factorial of " + n + " is: " + fact(n));
		input.close();
	}
	static int fact(int n)
	{
		if(n == 0 || n == 1)
			return 1;
		else
			return n * fact(n - 1);
	}
}

Input and output for the above program are as follows:

Enter a number: 
6
Factorial of 6 is: 720

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.