Complete newbie questions on libraries

Projects Programming
1

Hi all
I have a sketch that reads and logs Mains power usage via inputs from CT clamps.
I am trying to understand why it does not work. (i didn't write it)
so the first thing that puzzles me is that their one include statements
#include <Arduino.h>
but I can't find this library in my library folder would the compiler warn me if it couldn't find the library?
I'll probably have lots more questions :astonished:

thanks

Mike

2

so the first thing that puzzles me is that their one include statements
#include <Arduino.h>
but I can't find this library in my library folder

Of course not. It's a core "library".

3

thanks but I did say I was a complete newbie