Program to calculate Factorial of a number in Java

September 29, 2014 , 0 Comments

This java program finds factorial of a number. Entered number is checked first if its negative then an error message is printed.

import java.util.Scanner;

class Factorial
   public static void main(String args[])
      int n, c, fact = 1;

      System.out.println("Enter an integer to calculate it's factorial");
      Scanner in = new Scanner(;

      n = in.nextInt();

      if ( n < 0 )
         System.out.println("Number should be non-negative.");
         for ( c = 1 ; c <= n ; c++ )
            fact = fact*c;

         System.out.println("Factorial of "+n+" is = "+fact);

Factorial of a number in Java

if you have any questions or suggestions please write to us using contact us form.(Second Menu from top left).

Please share us on social media if you like the tutorial.

Prakash Hari Sharma
I'm a software developer and Java enthusiast. I like clean and modular code, enjoy Agile projects and have a passion for trying out new things. I try to learn and teach every day, and occasionally I'm even able to blog about it. :)