Methods

Method uses parameters.

class Quiz {
void result(int result,String grade){
   System.out.println(result);         
 }
}

-> int result varaiable act as parameter, Caller passes arguments.

Quiz q = new Quiz();
 q.result(4,"A");

-> in q.result(4,"A"),4 and A as arguments in same order of parameters in method . 

Return Type:-

-> void type means no return value

 Box box = new Box();
   int size = box.size();
   
   int size(){
      return 22; 
   }

-> Method returns value of declared return type. (Return type should equal to return value)