Java Program to Determine whether the number is Prime or not

      class PrimeNo
   {
     public static void main(String args[])
     {
       int num = Integer.parseInt(args[0]);
       int flag=0;
       for(int i=2;i< num;i++)
       {
         if(num%i==0)
         {
           System.out.println(num+" is not a Prime Number");
           flag = 1;
           break;
         }
       }
       if(flag==0)
       System.out.println(num+" is a Prime Number");
     }
   }