Platformio IDE kills code that is valid in Arduino IDE. Why?

Question

Arduino

I just started learning Arduino and immediately felt the inconvenience of working with the standard Arduino IDE. Since I use the Atom text editor, I found an extension for it, Platformio IDE. It's kind of like a complete system, but not standalone, but as an extension. OK, I installed it, started reading the documentation, put the Blink sketch code in there and immediately ran into the fact that the code did not pass verification. What's the matter?

Answer 1

Read the platform documentation first, or generate an example from it. And it will immediately become clear.
Ps You forgot: #include "Arduino.h"in the title
Pss For convenience, CLion with platform is better, but it also turns out more hemorrhoids.