Someone greeted me through Arduino IDE...

Hello,

I was working on my code when all of a sudden, this appeared in the output window.
Is this meant to be? Have I misclicked/pressed a key by accident? That is the only thing written here...

Am I getting hacked? Haha

I can't read that.

...R

Aliens or the Russians is my bet :wink:
It looks like YO or 7O ?

Could be anything as we dont have any idea from your post what you were doing at that moment or the full contents of the sketch ?