Wpb chapt2

You can use 'continue' to skip to the next step in the outer loop. This would mean you can just put the println in a position where it would be skipped by the continue so you don't need the isPrime variable.

i.e:
```java
OUTERLOOP:
for ( x = ... )  {
  for  ( y = ... )  {
    if ( ... ) {
     continue OUTERLOOP;
    }
  }
  print...
}
```