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# Can I say bool "inBounds!(point.X <0 && point.Y > Height)" or does ! only work with || ?

Can I say bool "inBounds!(point.X <0 && point.Y > Height)" or does ! only work with || ?

You can't put an operator between a method name and the parentheses used for calling it. But you can combine any logic operators (using proper syntax) in the expression as you need.

But also consider that you may just need to invert a test itself. For example, the opposite of "`<`" is "`>=`".

May have miscoded that//

In the previous video, I learned..

bool inBounds(point.X >= 0 && point.X < 8 && point.Y >= 0 && point.Y < 5); -- example 1 bool inBounds(!point.X < 0 || point.X > 8 || point.Y < 0 || point.Y > 5); -- example 2

Question is, can the "IS NOT operator - !" work with the "AND operator - &&" in example 1 or like in the example 2 above, do we only use the "IS NOT operator - !" with the "OR operator - ||"?

Sorry if I wasn't clear. Yes, you can use any logic operators together, as long as you observe proper syntax. But you also need to bear in mind that operators have an order of precedence and inversion is done before comparison unless you use parentheses to make it otherwise. To make example 2 work, you could do this:

``` bool inBounds = !(point.X < 0 || point.X > 8 || point.Y < 0 || point.Y > 5);
```

Notice I also added an assignment operator. I assume it was omitted since it did not make sense to put a "bool" declaration in front of a function call.

Also, when posting code, use Markdown formatting to preserve the code's appearance as I have done here.