Factorial of a number using while loop

Question

import java.util.*;
public class WhileFactorial {
    public static void main(String[] args)
    {
        System.out.println("Enter a number");
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int fact=1;
        while (num !=0);
        {
            fact = fact * num;
            num-=1;
        }
        System.out.println("Factorial of the number is "+fact);
    }
}

Answer 1

import java.util.*;
public class WhileFactorial {
    public static void main(String[] args)
    {
        System.out.println("Enter a number");
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int fact=1;
        while (num !=0)
        {
            fact = fact * num;
            num-=1;
        }
        System.out.println("Factorial of the number is "+fact);
    }
}

You have added a semicolon to while that completely changes the meaning of using while here.

Answer 2

import java.util.*;

public class Fact

{

    public static void main(String[] args)

       {

             int i=1,fact=1;

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

             Scanner sc=new Scanner(System.in);

             int num=sc.nextInt();

             while(i<=n)

               {

                  fact=fact*i;

                  i++;

                }

               System.out.println("Factorial is :",+fact);

        }

}