Can you assign a simple variable directly in Inspector without writing a script?

Yeah that's what i'm talking about. But to me as a noob in programming it seems kinda weird that you need to create a whole separate script just for adding a single number to gameobject. I mean there are all sorts of complicated things (Physics stuff, Animations, Particle Systems etc.) which can be assigned in one click to gameobject via editor gui and compared to this manually writing a primitime single line script for assigning a float or int looks like unnecessary overcomplication.