The electricity coming out of your wall is...
Wow everybody got this!
It depends on what wall, and which outlet. In the house, mostly AC, except for the 5V USB outlets integrated with two of the AC outlets. In the camper and motorhome, mostly DC, 12V automotive outlets and 5V USB outlets, unless I'm plugged in or running the generator, in which case the few installed AC outlets are "hot".
We can thank Nikolai Tesla for that
AC. By the way
Actually its Metallica