Sketch: "to" not declared

So this portion of this code:
}
void loop() {
while (BT.available()){ //Check if there is an available byte
to read
delay(10); //Delay added to make thing stable
char c = BT.read(); //Conduct a serial read
readvoice += c; //build the string- “forward”, “reverse”,
“left” and “right”
}
Can’t compile because ‘to’ was not declared. This is the code of a voice controlled robot via smartphone(Google) and I don’t know how to program in c++. Nothing. Can someone fix this sketch for me pls?

Looks to me like it's due to the line break in the comment. The "to read" is part of the //'d comment on the line above, but the line break puts it on its own line an the compiler thinks it's code, not comment.

Thanks a lot!

Kinorter:
I don't know how to program in c++. Nothing. Can someone fix this sketch for me pls?

It's not going to work for you in the long run if you just throw other folks' code into the compiler then ask for help to fix it when it falls over.

If I were you I'd start at the beginning with the samples in the IDE and actually learn some stuff.

That error would have been more obvious if you used tags to post, and followed basic indentation discipline.
It’s just practice, and you’ll become your own debugger!
In this case, you were lucky the issue was very simple in a small program!