FUNCTIONS BASED PROGRAM - void function & function with a return type

class aman
{
    public static void main(String args[])
    {
        func ob=new func();
        int ans=ob.sum(10,20); //function call
        System.out.println("the answer is = " +ans);
       
        ob.product(20,50);  //function call
       
       
    }
}
      

class func
{
    int sum(int a, int b)            //function with return type
    {
        int c=a+b;
        return c;
       
       
    }
    void product(int a, int b)     // function with no return type
    {
          int c=a*b;
          System.out.println("the product is = " +c);
    }
}