Walls and wall thickness and infill?

[Cyber-Mav]

How are number of walls and wall thickness related?
If using 2 walls i see it says 0.8mm wall thickness. Is that the thickness of a single wall or the 2 walls combined?

 

[Cyber-Mav]

Ahh is see. So if i change wall thickness to 1.2mm does that mean it will automatically use 3 walls of 0.4mm size?

 

[Cyber-Mav]

I assume more walls means you can get away with less infill?