Java intermediate buffer variable mechanism

        int count = 0 ;
        int num = 0 ;
        int i ;
        for (i = 0 ; i <= 100; i++){
            num +=i;
//            countFirst assign, each assignment is 0, after + +, intermediate buffer variable mechanism.
            count = count++ ;
//Running count++ is valid value every time.

//            count++;

            System.out.println(num+ "*" + count +" = "+ count * num );
        }
        System.out.println( "Finally: "+ count * num";
Running result