I'm not sure if this question has been answered(couldn't find it when I did a google search).
I saw <http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html> that the math class square root method returns a double. I experimented with it in eclipse with some ints that have whole square roots - 4, 9 and found that the square root with those always returned a floating point value with one decimal - 4.0, 9.0. I was curious as to why it even returned that extra decimal? I thought that ints could be considered as double values too. To me returning just 1 makes more sense cause you conserve more memory(i guess more memory is needed to store that extra decimal point) I even tested it out

```
public static double control(){
    return 1;
}

```

and saw it was valid to just return 1.