public class FloatArithm
{
    public static void main(String[] args)
    {
        double a, b, c;
        
        a = 4.2;    // Put breakpoint here to demo
        b = 2.0;
        
        c = a + b;   // 4.2 + 2.0 = 6.2
        c = a - b;   // 4.2 - 2.0 = 2.2
        c = a * b;   // 4.2 * 2.0 = 8.4
        c = a / b;   // 4.2 / 2.0 = 2.1
    }
}