// Exercise 1
//
// what does this program do?
// try to anticipate what the output will be,
// then key it in, compile it, run it and 
// verify your guess!
//
// note: keying in a program i tedious :/, but it is the
// best possible exercise to "getting used" to syntax :)
// 
// ... you don't need to copy the comments...
//

public class DemoBuiltins {

    public static void main(String[] a) {
       
        // define a few integer variables (type int),
        // assign values to them,
        // perform some operations and
        // output the result
 
        int an_int = 13;
        int another_int;

        another_int = 8;
        int result = (an_int + another_int) / 2;

        System.out.println(result);

        // do something similar using
        // floating point variables (type double)
        
        double a_number = 13;
        double y = 8;

        double r = (a_number + y) / 2;

        System.out.println(r);
        
        // int and double are built-in types
        // note that their names start with lower case letters!
 
    }
}