Day_1.java

        /* Declare second integer, double, and String variables. */
        int secondInteger=0;
        double secondDouble=0.0;
        String secondString=null;

        /* Read and save an integer, double, and String to your variables.*/
        secondInteger =Integer.parseInt(scan.nextLine());
        secondDouble = Double.parseDouble(scan.nextLine());
        secondString = scan.nextLine();
        /* Print the sum of both integer variables on a new line. */
        System.out.println(i+secondInteger);
        System.out.println(d+secondDouble);
        
        System.out.println(s+secondString);
            
        /* Print the sum of the double variables on a new line. */
		
        /* Concatenate and print the String variables on a new line; 
        	the 's' variable above should be printed first. */