Program to calculate Factorial of a number in Java

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(System.in);

      n = in.nextInt();

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

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

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.

SHARE