Are Roll and Pitch keywords?

Using Arduino Programming Questions
1

In the following structure, in a basically very simple program,the variables Roll and Pitch are of a different color meaning I guess they are keywords. Is this correct? Why?

typedef struct {
char Name[20] = "Hamil";
int Thrust = 11;
int Yaw = 22;
int Roll = 12;
int Pitch = 44;
int Fmode = 19;
} Payload;

2

In the Arduino IDE when a word turns orange it just means that some library writer included that word in their keywords.txt file. It doesn't mean that the word actually doe anything. It certainly doesn't mean that it is reserved. It doesn't even mean that it is in a library that you are using in your code, just that it is in some library on your computer.

It's a pretty useless thing the coloring on the Arduino IDE. There are IDE's where the context sensitive coloring works and actually tells you something. On Arduino the colors of words are meaningless.

3

In my case, the words Roll and Pitch are the same color as int, byte, and struct, a green color.
In my test,I am not including any libraries at all.

Thanks

4

barryjo:
In my case, the words Roll and Pitch are the same color as int, byte, and struct, a green color.
In my test,I am not including any libraries at all.

Thanks

It still doesn't tell you anything about how those words are used. They're certainly not reserved keywords. You should be fine to use them however you want in your code.

5

barryjo:
In my case, the words Roll and Pitch are the same color as int, byte, and struct, a green color.

That just means that in the root folder of one of your installed libraries there is a file named keywords.txt that contains the following lines:

Roll	LITERAL1
Pitch	LITERAL1

barryjo:
In my test,I am not including any libraries at all.

As Delta_G said, the Arduino IDE just blindly colors all keywords for all installed libraries regardless of whether you are actually using that library in your sketch.